Fixes migration for legacy orders so that completed_at information is not lost.
Fixes migration for legacy orders so that completed_at information is not lost.

[#1213 state:resolved]

miyazawatomoka/spree,APohio/spree,siddharth28/spree,yiqing95/spree,priyank-gupta/spree,sideci-sample/sideci-sample-spree,Lostmyname/spree,vcavallo/spree,reinaris/spree,vinsol/spree,ramkumar-kr/spree,vulk/spree,jimblesm/spree,rbngzlv/spree,maybii/spree,ramkumar-kr/spree,piousbox/spree,softr8/spree,SadTreeFriends/spree,raow/spree,Migweld/spree,Boomkat/spree,KMikhaylovCTG/spree,scottcrawford03/solidus,bjornlinder/Spree,Lostmyname/spree,sunny2601/spree,Migweld/spree,TimurTarasenko/spree,tomash/spree,patdec/spree,HealthWave/spree,sfcgeorge/spree,grzlus/spree,forkata/solidus,agient/agientstorefront,vinayvinsol/spree,NerdsvilleCEO/spree,carlesjove/spree,mleglise/spree,Arpsara/solidus,reinaris/spree,moneyspyder/spree,JuandGirald/spree,TimurTarasenko/spree,archSeer/spree,ahmetabdi/spree,azclick/spree,builtbybuffalo/spree,ujai/spree,vivekamn/spree,jasonfb/spree,carlesjove/spree,jeffboulet/spree,HealthWave/spree,omarsar/spree,TrialGuides/spree,volpejoaquin/spree,jordan-brough/spree,locomotivapro/spree,TimurTarasenko/spree,bonobos/solidus,tancnle/spree,shaywood2/spree,mleglise/spree,ramkumar-kr/spree,vmatekole/spree,pervino/solidus,radarseesradar/spree,alejandromangione/spree,kewaunited/spree,jordan-brough/solidus,njerrywerry/spree,softr8/spree,Hates/spree,wolfieorama/spree,judaro13/spree-fork,rajeevriitm/spree,Senjai/solidus,Kagetsuki/spree,jordan-brough/spree,brchristian/spree,Boomkat/spree,camelmasa/spree,Antdesk/karpal-spree,pervino/spree,vinayvinsol/spree,edgward/spree,grzlus/spree,DarkoP/spree,bjornlinder/Spree,lzcabrera/spree-1-3-stable,useiichi/spree,Arpsara/solidus,patdec/spree,zamiang/spree,grzlus/spree,lyzxsc/spree,lsirivong/spree,Boomkat/spree,keatonrow/spree,berkes/spree,PhoenixTeam/spree_phoenix,pulkit21/spree,Arpsara/solidus,Nevensoft/spree,maybii/spree,alvinjean/spree,tailic/spree,wolfieorama/spree,Mayvenn/spree,sliaquat/spree,woboinc/spree,gregoryrikson/spree-sample,Nevensoft/spree,miyazawatomoka/spree,reidblomquist/spree,carlesjove/spree,bonobos/solidus,Senjai/spree,devilcoders/solidus,jsurdilla/solidus,Machpowersystems/spree_mach,rajeevriitm/spree,DynamoMTL/spree,SadTreeFriends/spree,hifly/spree,hoanghiep90/spree,priyank-gupta/spree,quentinuys/spree,azclick/spree,jimblesm/spree,biagidp/spree,jhawthorn/spree,judaro13/spree-fork,trigrass2/spree,net2b/spree,moneyspyder/spree,gautamsawhney/spree,reidblomquist/spree,tailic/spree,adaddeo/spree,PhoenixTeam/spree_phoenix,surfdome/spree,cutefrank/spree,tesserakt/clean_spree,hifly/spree,CJMrozek/spree,freerunningtech/spree,judaro13/spree-fork,odk211/spree,jaspreet21anand/spree,urimikhli/spree,preston-scott/spree,yushine/spree,vulk/spree,Hawaiideveloper/shoppingcart,joanblake/spree,patdec/spree,biagidp/spree,Senjai/spree,camelmasa/spree,sfcgeorge/spree,joanblake/spree,siddharth28/spree,delphsoft/spree-store-ballchair,berkes/spree,jordan-brough/solidus,Engeltj/spree,grzlus/solidus,lsirivong/solidus,lsirivong/solidus,sfcgeorge/spree,jeffboulet/spree,sliaquat/spree,lsirivong/spree,caiqinghua/spree,abhishekjain16/spree,TrialGuides/spree,zaeznet/spree,grzlus/spree,Senjai/solidus,Hates/spree,edgward/spree,patdec/spree,shaywood2/spree,berkes/spree,jimblesm/spree,Arpsara/solidus,Hates/spree,Migweld/spree,biagidp/spree,azranel/spree,AgilTec/spree,woboinc/spree,gautamsawhney/spree,DarkoP/spree,athal7/solidus,adaddeo/spree,progsri/spree,agient/agientstorefront,volpejoaquin/spree,dandanwei/spree,welitonfreitas/spree,xuewenfei/solidus,ckk-scratch/solidus,DynamoMTL/spree,Ropeney/spree,mleglise/spree,firman/spree,lsirivong/solidus,ujai/spree,jaspreet21anand/spree,forkata/solidus,project-eutopia/spree,tancnle/spree,mindvolt/spree,shaywood2/spree,omarsar/spree,Hawaiideveloper/shoppingcart,Antdesk/karpal-spree,devilcoders/solidus,tesserakt/clean_spree,azranel/spree,Lostmyname/spree,jparr/spree,wolfieorama/spree,lyzxsc/spree,tomash/spree,reidblomquist/spree,freerunningtech/spree,madetech/spree,odk211/spree,edgward/spree,surfdome/spree,firman/spree,firman/spree,ayb/spree,Migweld/spree,jordan-brough/spree,calvinl/spree,rajeevriitm/spree,jeffboulet/spree,caiqinghua/spree,jeffboulet/spree,KMikhaylovCTG/spree,sanjay1185/mystore,Senjai/spree,brchristian/spree,lzcabrera/spree-1-3-stable,vcavallo/spree,PhoenixTeam/spree_phoenix,Ropeney/spree,kewaunited/spree,tomash/spree,thogg4/spree,pervino/solidus,xuewenfei/solidus,CJMrozek/spree,CJMrozek/spree,woboinc/spree,Machpowersystems/spree_mach,CiscoCloud/spree,APohio/spree,urimikhli/spree,raow/spree,caiqinghua/spree,yushine/spree,shioyama/spree,pjmj777/spree,KMikhaylovCTG/spree,bricesanchez/spree,bryanmtl/spree_clear2pay,cutefrank/spree,madetech/spree,Engeltj/spree,agient/agientstorefront,Nevensoft/spree,grzlus/solidus,azranel/spree,reinaris/spree,abhishekjain16/spree,hoanghiep90/spree,locomotivapro/spree,SadTreeFriends/spree,shekibobo/spree,project-eutopia/spree,nooysters/spree,APohio/spree,jaspreet21anand/spree,radarseesradar/spree,degica/spree,vinsol/spree,SadTreeFriends/spree,RatioClothing/spree,lsirivong/spree,project-eutopia/spree,azranel/spree,forkata/solidus,progsri/spree,Nevensoft/spree,radarseesradar/spree,Mayvenn/spree,JuandGirald/spree,groundctrl/spree,jasonfb/spree,ckk-scratch/solidus,karlitxo/spree,sliaquat/spree,wolfieorama/spree,karlitxo/spree,yiqing95/spree,rakibulislam/spree,fahidnasir/spree,archSeer/spree,shekibobo/spree,mindvolt/spree,alvinjean/spree,lzcabrera/spree-1-3-stable,rbngzlv/spree,ahmetabdi/spree,forkata/solidus,LBRapid/spree,jasonfb/spree,hoanghiep90/spree,JuandGirald/spree,JDutil/spree,dandanwei/spree,alvinjean/spree,JuandGirald/spree,hifly/spree,CiscoCloud/spree,yushine/spree,Kagetsuki/spree,archSeer/spree,orenf/spree,jspizziri/spree,jsurdilla/solidus,firman/spree,groundctrl/spree,net2b/spree,gregoryrikson/spree-sample,locomotivapro/spree,scottcrawford03/solidus,Engeltj/spree,FadliKun/spree,LBRapid/spree,TimurTarasenko/spree,knuepwebdev/FloatTubeRodHolders,Lostmyname/spree,kewaunited/spree,surfdome/spree,Ropeney/spree,odk211/spree,mindvolt/spree,beni55/spree,alejandromangione/spree,TrialGuides/spree,radarseesradar/spree,rbngzlv/spree,nooysters/spree,rakibulislam/spree,ramkumar-kr/spree,alejandromangione/spree,watg/spree,vinsol/spree,bonobos/solidus,vinayvinsol/spree,shioyama/spree,imella/spree,derekluo/spree,nooysters/spree,tomash/spree,omarsar/spree,delphsoft/spree-store-ballchair,dotandbo/spree,richardnuno/solidus,camelmasa/spree,zamiang/spree,richardnuno/solidus,siddharth28/spree,watg/spree,orenf/spree,AgilTec/spree,RatioClothing/spree,bjornlinder/Spree,ayb/spree,njerrywerry/spree,volpejoaquin/spree,surfdome/spree,vcavallo/spree,calvinl/spree,sideci-sample/sideci-sample-spree,degica/spree,madetech/spree,StemboltHQ/spree,jimblesm/spree,tancnle/spree,derekluo/spree,keatonrow/spree,ahmetabdi/spree,devilcoders/solidus,sunny2601/spree,fahidnasir/spree,nooysters/spree,beni55/spree,ayb/spree,groundctrl/spree,volpejoaquin/spree,tesserakt/clean_spree,miyazawatomoka/spree,robodisco/spree,fahidnasir/spree,Antdesk/karpal-spree,NerdsvilleCEO/spree,groundctrl/spree,shekibobo/spree,pjmj777/spree,HealthWave/spree,yiqing95/spree,sfcgeorge/spree,trigrass2/spree,jasonfb/spree,keatonrow/spree,delphsoft/spree-store-ballchair,urimikhli/spree,pulkit21/spree,xuewenfei/solidus,dotandbo/spree,jsurdilla/solidus,rakibulislam/spree,bonobos/solidus,knuepwebdev/FloatTubeRodHolders,vmatekole/spree,jaspreet21anand/spree,mleglise/spree,locomotivapro/spree,builtbybuffalo/spree,cutefrank/spree,dafontaine/spree,jordan-brough/solidus,Senjai/solidus,piousbox/spree,odk211/spree,AgilTec/spree,berkes/spree,ujai/spree,zaeznet/spree,shaywood2/spree,StemboltHQ/spree,adaddeo/spree,Senjai/solidus,jsurdilla/solidus,useiichi/spree,calvinl/spree,tancnle/spree,net2b/spree,hoanghiep90/spree,dafontaine/spree,alejandromangione/spree,pervino/spree,pulkit21/spree,vivekamn/spree,kewaunited/spree,APohio/spree,piousbox/spree,CJMrozek/spree,NerdsvilleCEO/spree,degica/spree,priyank-gupta/spree,DynamoMTL/spree,knuepwebdev/FloatTubeRodHolders,caiqinghua/spree,AgilTec/spree,jspizziri/spree,Hates/spree,adaddeo/spree,brchristian/spree,sideci-sample/sideci-sample-spree,softr8/spree,zaeznet/spree,archSeer/spree,robodisco/spree,joanblake/spree,abhishekjain16/spree,kitwalker12/spree,trigrass2/spree,codesavvy/sandbox,builtbybuffalo/spree,dandanwei/spree,dotandbo/spree,thogg4/spree,pervino/spree,vinayvinsol/spree,JDutil/spree,vulk/spree,zamiang/spree,Hawaiideveloper/shoppingcart,jspizziri/spree,beni55/spree,yiqing95/spree,FadliKun/spree,lyzxsc/spree,StemboltHQ/spree,quentinuys/spree,trigrass2/spree,net2b/spree,vcavallo/spree,lsirivong/spree,robodisco/spree,gautamsawhney/spree,vmatekole/spree,LBRapid/spree,kitwalker12/spree,dafontaine/spree,jhawthorn/spree,progsri/spree,derekluo/spree,alepore/spree,fahidnasir/spree,ayb/spree,priyank-gupta/spree,progsri/spree,sunny2601/spree,tailic/spree,karlitxo/spree,raow/spree,RatioClothing/spree,jparr/spree,lyzxsc/spree,builtbybuffalo/spree,pervino/spree,JDutil/spree,FadliKun/spree,orenf/spree,assembledbrands/spree,DarkoP/spree,thogg4/spree,Mayvenn/spree,pulkit21/spree,piousbox/spree,edgward/spree,jparr/spree,njerrywerry/spree,brchristian/spree,welitonfreitas/spree,softr8/spree,yushine/spree,dotandbo/spree,CiscoCloud/spree,bricesanchez/spree,moneyspyder/spree,rbngzlv/spree,ckk-scratch/solidus,gautamsawhney/spree,grzlus/solidus,maybii/spree,Machpowersystems/spree_mach,karlitxo/spree,bricesanchez/spree,richardnuno/solidus,quentinuys/spree,alepore/spree,jhawthorn/spree,athal7/solidus,FadliKun/spree,useiichi/spree,tesserakt/clean_spree,gregoryrikson/spree-sample,robodisco/spree,scottcrawford03/solidus,yomishra/pce,NerdsvilleCEO/spree,preston-scott/spree,codesavvy/sandbox,project-eutopia/spree,DarkoP/spree,dandanwei/spree,Engeltj/spree,camelmasa/spree,njerrywerry/spree,pjmj777/spree,vmatekole/spree,calvinl/spree,xuewenfei/solidus,zaeznet/spree,jspizziri/spree,shekibobo/spree,codesavvy/sandbox,madetech/spree,thogg4/spree,keatonrow/spree,JDutil/spree,watg/spree,freerunningtech/spree,yomishra/pce,rakibulislam/spree,KMikhaylovCTG/spree,Boomkat/spree,vinsol/spree,athal7/solidus,pervino/solidus,assembledbrands/spree,yomishra/pce,azclick/spree,Ropeney/spree,siddharth28/spree,PhoenixTeam/spree_phoenix,sliaquat/spree,alepore/spree,Kagetsuki/spree,welitonfreitas/spree,zamiang/spree,hifly/spree,agient/agientstorefront,azclick/spree,moneyspyder/spree,miyazawatomoka/spree,grzlus/solidus,sunny2601/spree,quentinuys/spree,reinaris/spree,ahmetabdi/spree,vulk/spree,beni55/spree,dafontaine/spree,assembledbrands/spree,jordan-brough/solidus,welitonfreitas/spree,jparr/spree,imella/spree,kitwalker12/spree,devilcoders/solidus,CiscoCloud/spree,rajeevriitm/spree,imella/spree,mindvolt/spree,ckk-scratch/solidus,Kagetsuki/spree,abhishekjain16/spree,DynamoMTL/spree,alvinjean/spree,useiichi/spree,athal7/solidus,scottcrawford03/solidus,carlesjove/spree,TrialGuides/spree,maybii/spree,pervino/solidus,Hawaiideveloper/shoppingcart,omarsar/spree,joanblake/spree,cutefrank/spree,Mayvenn/spree,richardnuno/solidus,orenf/spree,derekluo/spree,gregoryrikson/spree-sample,reidblomquist/spree,codesavvy/sandbox,shioyama/spree,raow/spree,delphsoft/spree-store-ballchair,lsirivong/solidus