Do not to_s the machine id if it is nil When destroying a machine, the machine id is set to nil, the to_s causes it to be set to empty string.  This can cause inconsistent behavior in anything (such as plugins) that tests the machine id.
Do not to_s the machine id if it is nil
When destroying a machine, the machine id is set to nil, the to_s causes it to be set to empty string.  This can cause inconsistent behavior in anything (such as plugins) that tests the machine id.

p0deje/vagrant,jean/vagrant,fnewberg/vagrant,modulexcite/vagrant,stephancom/vagrant,zsjohny/vagrant,philwrenn/vagrant,kamigerami/vagrant,gajdaw/vagrant,aneeshusa/vagrant,doy/vagrant,theist/vagrant,vamegh/vagrant,patrys/vagrant,gbarberi/vagrant,tschortsch/vagrant,Sgoettschkes/vagrant,philoserf/vagrant,gpkfr/vagrant,mwrock/vagrant,senglin/vagrant,jhoblitt/vagrant,miguel250/vagrant,benizi/vagrant,tjanez/vagrant,muhanadra/vagrant,blueyed/vagrant,evverx/vagrant,marxarelli/vagrant,PatrickLang/vagrant,loren-osborn/vagrant,ArloL/vagrant,johntron/vagrant,mkuzmin/vagrant,tbriggs-curse/vagrant,ArloL/vagrant,dustymabe/vagrant,jfchevrette/vagrant,janek-warchol/vagrant,krig/vagrant,benh57/vagrant,jtopper/vagrant,teotihuacanada/vagrant,TheBigBear/vagrant,blueyed/vagrant,cgvarela/vagrant,bdwyertech/vagrant,apertoso/vagrant,jmanero/vagrant,benizi/vagrant,Chhed13/vagrant,marxarelli/vagrant,kamigerami/vagrant,janek-warchol/vagrant,cgvarela/vagrant,cgvarela/vagrant,muhanadra/vagrant,theist/vagrant,miguel250/vagrant,Sgoettschkes/vagrant,dhoer/vagrant,mwarren/vagrant,chrisvire/vagrant,zsjohny/vagrant,bshurts/vagrant,miguel250/vagrant,mkuzmin/vagrant,Chhunlong/vagrant,Avira/vagrant,jfchevrette/vagrant,jkburges/vagrant,ferventcoder/vagrant,senglin/vagrant,genome21/vagrant,jmanero/vagrant,tknerr/vagrant,legal90/vagrant,bryson/vagrant,kamazee/vagrant,gbarberi/vagrant,signed8bit/vagrant,taliesins/vagrant,Endika/vagrant,bryson/vagrant,justincampbell/vagrant,clinstid/vagrant,loren-osborn/vagrant,krig/vagrant,bheuvel/vagrant,muhanadra/vagrant,justincampbell/vagrant,mitchellh/vagrant,tbriggs-curse/vagrant,mwarren/vagrant,darkn3rd/vagrant,loren-osborn/vagrant,wkolean/vagrant,kamazee/vagrant,dharmab/vagrant,aaam/vagrant,gpkfr/vagrant,tomfanning/vagrant,TheBigBear/vagrant,bryson/vagrant,gajdaw/vagrant,tbarrongh/vagrant,mkuzmin/vagrant,tschortsch/vagrant,aneeshusa/vagrant,obnoxxx/vagrant,rivy/vagrant,stephancom/vagrant,dharmab/vagrant,Chhunlong/vagrant,gitebra/vagrant,lukebakken/vagrant,mwarren/vagrant,PatOShea/vagrant,dhoer/vagrant,sax/vagrant,tjanez/vagrant,jberends/vagrant,dustymabe/vagrant,h4ck3rm1k3/vagrant,dhoer/vagrant,philoserf/vagrant,tbarrongh/vagrant,doy/vagrant,sni/vagrant,vamegh/vagrant,pwnall/vagrant,MiLk/vagrant,janek-warchol/vagrant,rivy/vagrant,otagi/vagrant,tjanez/vagrant,jkburges/vagrant,tomfanning/vagrant,rivy/vagrant,h4ck3rm1k3/vagrant,kamigerami/vagrant,shtouff/vagrant,sax/vagrant,teotihuacanada/vagrant,petems/vagrant,lukebakken/vagrant,Chhunlong/vagrant,tknerr/vagrant,kalabiyau/vagrant,jmanero/vagrant,genome21/vagrant,fnewberg/vagrant,PatOShea/vagrant,dharmab/vagrant,blueyed/vagrant,gbarberi/vagrant,mpoeter/vagrant,ianmiell/vagrant,bheuvel/vagrant,jhoblitt/vagrant,loren-osborn/vagrant,chrisroberts/vagrant,bdwyertech/vagrant,genome21/vagrant,channui/vagrant,gpkfr/vagrant,tknerr/vagrant,signed8bit/vagrant,crashlytics/vagrant,zsjohny/vagrant,gitebra/vagrant,cgvarela/vagrant,mpoeter/vagrant,evverx/vagrant,taliesins/vagrant,mpoeter/vagrant,darkn3rd/vagrant,aneeshusa/vagrant,rivy/vagrant,vamegh/vagrant,h4ck3rm1k3/vagrant,patrys/vagrant,lukebakken/vagrant,bdwyertech/vagrant,PatrickLang/vagrant,pwnall/vagrant,clinstid/vagrant,crashlytics/vagrant,sax/vagrant,kamazee/vagrant,Avira/vagrant,stephancom/vagrant,modulexcite/vagrant,jberends/vagrant,muhanadra/vagrant,wkolean/vagrant,sni/vagrant,aaam/vagrant,invernizzi-at-google/vagrant,wangfakang/vagrant,crashlytics/vagrant,lonniev/vagrant,sideci-sample/sideci-sample-vagrant,fnewberg/vagrant,chrisvire/vagrant,carlosefr/vagrant,jean/vagrant,theist/vagrant,jberends/vagrant,denisbr/vagrant,krig/vagrant,philoserf/vagrant,BlakeMesdag/vagrant,clinstid/vagrant,kalabiyau/vagrant,TheBigBear/vagrant,denisbr/vagrant,Endika/vagrant,kamazee/vagrant,bdwyertech/vagrant,pwnall/vagrant,ferventcoder/vagrant,gbarberi/vagrant,chrisvire/vagrant,wangfakang/vagrant,Endika/vagrant,petems/vagrant,obnoxxx/vagrant,kalabiyau/vagrant,sideci-sample/sideci-sample-vagrant,myrjola/vagrant,bshurts/vagrant,ferventcoder/vagrant,chrisroberts/vagrant,tbarrongh/vagrant,ArloL/vagrant,sax/vagrant,petems/vagrant,apertoso/vagrant,otagi/vagrant,juiceinc/vagrant,jtopper/vagrant,jberends/vagrant,mitchellh/vagrant,tschortsch/vagrant,doy/vagrant,legal90/vagrant,myrjola/vagrant,modulexcite/vagrant,kalabiyau/vagrant,tomfanning/vagrant,carlosefr/vagrant,obnoxxx/vagrant,teotihuacanada/vagrant,Chhed13/vagrant,h4ck3rm1k3/vagrant,taliesins/vagrant,mpoeter/vagrant,MiLk/vagrant,bheuvel/vagrant,Chhunlong/vagrant,johntron/vagrant,iNecas/vagrant,vamegh/vagrant,juiceinc/vagrant,mitchellh/vagrant,ianmiell/vagrant,PatrickLang/vagrant,signed8bit/vagrant,patrys/vagrant,dustymabe/vagrant,ianmiell/vagrant,carlosefr/vagrant,Sgoettschkes/vagrant,tschortsch/vagrant,wkolean/vagrant,invernizzi-at-google/vagrant,johntron/vagrant,jmanero/vagrant,philwrenn/vagrant,benizi/vagrant,dharmab/vagrant,Endika/vagrant,jfchevrette/vagrant,aneeshusa/vagrant,invernizzi-at-google/vagrant,sni/vagrant,Avira/vagrant,teotihuacanada/vagrant,mwrock/vagrant,shtouff/vagrant,philwrenn/vagrant,tjanez/vagrant,invernizzi-at-google/vagrant,legal90/vagrant,mwrock/vagrant,juiceinc/vagrant,bshurts/vagrant,marxarelli/vagrant,MiLk/vagrant,chrisroberts/vagrant,doy/vagrant,gitebra/vagrant,bryson/vagrant,mitchellh/vagrant,theist/vagrant,evverx/vagrant,Chhed13/vagrant,petems/vagrant,gajdaw/vagrant,benh57/vagrant,aaam/vagrant,ArloL/vagrant,jkburges/vagrant,PatOShea/vagrant,tbriggs-curse/vagrant,blueyed/vagrant,fnewberg/vagrant,dhoer/vagrant,justincampbell/vagrant,lonniev/vagrant,benh57/vagrant,jhoblitt/vagrant,ferventcoder/vagrant,nickryand/vagrant,darkn3rd/vagrant,channui/vagrant,shtouff/vagrant,lukebakken/vagrant,p0deje/vagrant,chrisvire/vagrant,bshurts/vagrant,denisbr/vagrant,jean/vagrant,johntron/vagrant,signed8bit/vagrant,gitebra/vagrant,tomfanning/vagrant,BlakeMesdag/vagrant,jfchevrette/vagrant,myrjola/vagrant,sideci-sample/sideci-sample-vagrant,tknerr/vagrant,wangfakang/vagrant,tbarrongh/vagrant,bheuvel/vagrant,senglin/vagrant,iNecas/vagrant,miguel250/vagrant,pwnall/vagrant,apertoso/vagrant,ianmiell/vagrant,lonniev/vagrant,gpkfr/vagrant,patrys/vagrant,carlosefr/vagrant,Sgoettschkes/vagrant,tbriggs-curse/vagrant,aaam/vagrant,genome21/vagrant,iNecas/vagrant,stephancom/vagrant,juiceinc/vagrant,otagi/vagrant,jean/vagrant,p0deje/vagrant,channui/vagrant,philoserf/vagrant,nickryand/vagrant,benh57/vagrant,philwrenn/vagrant,nickryand/vagrant,apertoso/vagrant,jtopper/vagrant,janek-warchol/vagrant,benizi/vagrant,myrjola/vagrant,mwrock/vagrant,wangfakang/vagrant,mwarren/vagrant,wkolean/vagrant,PatrickLang/vagrant,zsjohny/vagrant,TheBigBear/vagrant,Chhed13/vagrant,BlakeMesdag/vagrant,jhoblitt/vagrant,marxarelli/vagrant,darkn3rd/vagrant,mkuzmin/vagrant,nickryand/vagrant,legal90/vagrant,Avira/vagrant,kamigerami/vagrant,PatOShea/vagrant,senglin/vagrant,lonniev/vagrant,justincampbell/vagrant,dustymabe/vagrant,sni/vagrant,modulexcite/vagrant,chrisroberts/vagrant,taliesins/vagrant,crashlytics/vagrant,jtopper/vagrant,denisbr/vagrant,krig/vagrant,shtouff/vagrant,otagi/vagrant,jkburges/vagrant