Fixes bug with articles_categories not migrating.
Fixes bug with articles_categories not migrating.

Missing #each method call when finding all ArticlesCategory

Signed-off-by: Cyril Mougel <65e2c732b89eea4cad6477a35e119bf4ad0a21cd@gmail.com>
leminhtuan2015/test_temona,silygose/typo,nguyenduyta/deploy-test,waruboy/publify,publify/publify,leminhtuan2015/nginx_capuchino_rails,agiamas/publify,ashleymichal/typo,arramos84/cs169-hw5,shrayus/hw-refactoring-legecy-code,faraazkhan/myblog,totzYuta/coding-diary-of-totz,boostsup/HW5_typo,jcfausto/publify,silygose/typo,seyedrazavi/publify,mplstar/blog,ashleymichal/typo,mozzan/publify,kildem/blog,mplstar/blog,edgarpng/typo-blog,vivekv009/inuni-blog,ashrob/typo,faraazkhan/myblog,moneyadviceservice/publify,ACPK/typo,nvgit/typo1,randyramadhana/typo,felixitous/typoo,vivekv009/inuni-blog,kildem/blog,xwang191/-edX.CS169.2x.hw1,randyramadhana/typo,leminhtuan2015/nginx_capuchino_rails,matthewliu/saas_hw5,ashleymichal/typo,freibuis/publify,vincenttian/cs169hw5,wizzro/CS169.2x-hw1-2,nguyenduyta/deploy-test,ACPK/typo,babaa/foodblog,SF-WDI-LABS/publify_debugging_lab,ACPK/typo,khlumzeemee/typo,leminhtuan2015/portal_staging,alexhuang91/typo,lbiedinger/cs_typo,shrayus/hw-refactoring-legecy-code,leminhtuan2015/nginx_capuchino_rails,congchen5/typo,Chickey2/typo,freeranger/typo,nvgit/typo1,moneyadviceservice/publify,waruboy/publify,shrayus/hw-refactoring-legecy-code,bikmaeff/CS169.2_hw12,drakontia/publify,publify/publify,gvaquez/typo,robinparadise/typo,whithajess/publify,sf-wdi-25/publify_debugging_lab,felixitous/typoo,bikmaeff/CS169.2_hw12,telekomatrix/publify,framgia/publify,agiamas/publify,blairanderson/that-music-blog,pr0d1r2/typo,sf-wdi-25/publify_debugging_lab,arramos84/cs169-hw5,kmathew96/typo,hmallett/publify,saasbook/typo,lbiedinger/cs_typo,freeranger/typo,lbiedinger/cs_typo,pr0d1r2/typo,leminhtuan2015/test_temona,kmathew96/typo,leminhtuan2015/temona_staging,freibuis/publify,leminhtuan2015/portal_staging,pr0d1r2/typo,saasbook/typo,blairanderson/that-music-blog,telekomatrix/publify,whithajess/publify,amba178/legacy_code,mplstar/blog,SF-WDI-LABS/publify_debugging_lab,gvaquez/typo,silygose/typo,tedfrazier/saas_typo,sbstn-jmnz/typo,zsstor/Typo,telekomatrix/publify,leminhtuan2015/temona_staging,LOSDev/CS169-Homework-5,hmallett/publify,Chickey2/typo,P5hil/typo,congchen5/typo,boostsup/HW5_typo,jcfausto/publify,sbstn-jmnz/typo,saasbook/typo,solanolabs/publify,freeranger/typo,publify/publify,shimolshah/typo-backup,babaa/foodblog,robinparadise/typo,aren19/HW_5,pr0d1r2/typo,K-and-R/publify,sbstn-jmnz/typo,backpackerhh/typo,seyedrazavi/publify,ndueber/cs-169_hw5,framgia/publify,kildem/blog,vincenttian/cs169hw5,LOSDev/CS169-Homework-5,kildem/blog,kmathew96/typo,tinnywang/typo,burakicel/Burakicel.com,pr0d1r2/typo,amba178/legacy_code,mrfosip/typo,tinnywang/typo,jcfausto/publify,agiamas/publify,vivekv009/inuni-blog,mozzan/publify,ashrob/typo,shimolshah/typo-backup,Juuro/publify,backpackerhh/typo,blairanderson/that-music-blog,Juuro/publify,edgarpng/typo-blog,K-and-R/publify,natesholland/typo,wizzro/CS169.2x-hw1-2,khlumzeemee/typo,bsiebz/legacyhw,seyedrazavi/publify,natesholland/typo,Endymion1977/typo,K-and-R/publify,randyramadhana/typo,LOSDev/CS169-Homework-5,matthewliu/saas_hw5,whithajess/publify,drakontia/publify,nguyenduyta/deploy-test,nvgit/typo1,leminhtuan2015/temona_staging,freibuis/publify,moneyadviceservice/publify,vincenttian/cs169hw5,hmallett/publify,aren19/HW_5,pr0d1r2/typo,bsiebz/legacyhw,leminhtuan2015/portal_staging,shimolshah/typo-backup,boostsup/HW5_typo,mozzan/publify,sf-wdi-25/publify_debugging_lab,pr0d1r2/typo,P5hil/typo,solanolabs/publify,solanolabs/publify,bikmaeff/CS169.2_hw12,shaomingtan/publify,leminhtuan2015/nginx_capuchino_rails,shaomingtan/publify,waruboy/publify,SF-WDI-LABS/publify_debugging_lab,arramos84/cs169-hw5,P5hil/typo,moneyadviceservice/publify,kryptykfysh/saas_typo,ndueber/cs-169_hw5,xwang191/-edX.CS169.2x.hw1,zsstor/Typo,ndueber/cs-169_hw5,backpackerhh/typo,Endymion1977/typo,kryptykfysh/saas_typo,totzYuta/coding-diary-of-totz,nvgit/typo1,zsstor/Typo,alexhuang91/typo,LOSDev/CS169-Homework-5,Juuro/publify,burakicel/Burakicel.com,natesholland/typo,pr0d1r2/typo,leminhtuan2015/portal_staging,bsiebz/legacyhw,felixitous/typoo,tedfrazier/saas_typo,leminhtuan2015/test_temona,mrfosip/typo