Fix ISSUE schema.
Fix ISSUE schema.

- MILESTONE_ID is NULLABLE
- Add ASIGNED_USER_NAME column
garygreen/gitbucket,takuok/gitbucket,sekia556/gitbucket,fbelzunc/gitbucket,McFoggy/gitbucket,JanWilliem/gitbucket,CapeSepias/gitbucket,nobusugi246/gitbucket,marklacroix/gitbucket,otosan/gitbucket,intermezzo-fr/gitbucket,snowgooseyk/gitbucket,CapeSepias/gitbucket,toshi-saito/gitbucket,eiryu/gitbucket,DaniloAndrade/gitbucket,dera0520/gitbucket,JanWilliem/gitbucket,tily/gitbucket2,FlYnN91/gitbucket,ssogabe/gitbucket,noc06140728/gitbucket,eiryu/gitbucket,mcveat/gitbucket,Pfiver/gitbucket,indare/gitbucket,odz/gitbucket,kxbmap/gitbucket,mrkm4ntr/gitbucket,nobusugi246/gitbucket,otosan/gitbucket,imeszaros/gitbucket,otosan/gitbucket,nus/gitbucket,yonglehou/gitbucket,s-takatsu/gitbucket,pinghe/gitbucket,JanWilliem/gitbucket,nobusugi246/gitbucket,superhj1987/gitbucket,gencer/gitbucket,McFoggy/gitbucket,mrkm4ntr/gitbucket,lefou/gitbucket,zhoffice/gitbucket,mann-ed/gitbucket,sekia556/gitbucket,shiena/gitbucket,team-lab/gitbucket,otosan/gitbucket,x-way/gitbucket,lefou/gitbucket,takuok/gitbucket,moyfujii/gitbucket,doron123/gitbucket,yonglehou/gitbucket,kkismd/gitbucket,chazmuzz/gitbucket,garygreen/gitbucket,zhoffice/gitbucket,chazmuzz/gitbucket,team-lab/gitbucket,shiena/gitbucket,mann-ed/gitbucket,KazukiOhashi/gitbucket,indare/gitbucket,mrkm4ntr/gitbucket,KazukiOhashi/gitbucket,uli-heller/gitbucket,rabitarochan/gitbucket,fbelzunc/gitbucket,imeszaros/gitbucket,Peterinor/gitbucket,beni55/gitbucket,hilerchyn/gitbucket,kounoike/gitbucket,KazukiOhashi/gitbucket,toshi-saito/gitbucket,kkismd/gitbucket,hilerchyn/gitbucket,sekia556/gitbucket,Pfiver/gitbucket,intermezzo-fr/gitbucket,tily/gitbucket2,doron123/gitbucket,uli-heller/gitbucket,marklacroix/gitbucket,xuwei-k/gitbucket,snowgooseyk/gitbucket,superhj1987/gitbucket,tb280320889/TESTTB,x-way/gitbucket,marklacroix/gitbucket,JanWilliem/gitbucket,imeszaros/gitbucket,zhoffice/gitbucket,lefou/gitbucket,ccskoba/gitbucket,nobusugi246/gitbucket,rantav/gitbucket,dera0520/gitbucket,smly/gitbucket,lefou/gitbucket,gencer/gitbucket,nagase2/gitbucket,FlYnN91/gitbucket,ssogabe/gitbucket,gitbucket/gitbucket,oho-sugu/gitbucket,snowgooseyk/gitbucket,dera0520/gitbucket,kounoike/gitbucket,rabitarochan/gitbucket,nus/gitbucket,skohar/gitbucket,takezoe/gitbucket,tb280320889/TESTTB,yonglehou/gitbucket,kanmi/gitbucket,kounoike/gitbucket,mrkm4ntr/gitbucket,CapeSepias/gitbucket,CapeSepias/gitbucket,takezoe/gitbucket,beni55/gitbucket,gitbucket/gitbucket,robinst/gitbucket,avldya/gitbucket,kkismd/gitbucket,s-takatsu/gitbucket,DaniloAndrade/gitbucket,DaniloAndrade/gitbucket,beni55/gitbucket,s-takatsu/gitbucket,gencer/gitbucket,intermezzo-fr/gitbucket,toshi-saito/gitbucket,oho-sugu/gitbucket,noc06140728/gitbucket,nus/gitbucket,noc06140728/gitbucket,hilerchyn/gitbucket,smly/gitbucket,snowgooseyk/gitbucket,yonglehou/gitbucket,kxbmap/gitbucket,Peterinor/gitbucket,indare/gitbucket,uli-heller/gitbucket,Peterinor/gitbucket,eiryu/gitbucket,FlYnN91/gitbucket,ccskoba/gitbucket,kanmi/gitbucket,nus/gitbucket,tb280320889/TESTTB,intermezzo-fr/gitbucket,marklacroix/gitbucket,KazukiOhashi/gitbucket,pinghe/gitbucket,pinghe/gitbucket,skohar/gitbucket,noc06140728/gitbucket,moyfujii/gitbucket,okumin/gitbucket,avldya/gitbucket,x-way/gitbucket,robinst/gitbucket,xuwei-k/gitbucket,odz/gitbucket,beni55/gitbucket,tily/gitbucket2,kkismd/gitbucket,mann-ed/gitbucket,xuwei-k/gitbucket,moyfujii/gitbucket,McFoggy/gitbucket,s-takatsu/gitbucket,smly/gitbucket,swaldman/gitbucket,ccskoba/gitbucket,Pfiver/gitbucket,superhj1987/gitbucket,team-lab/gitbucket,nagase2/gitbucket,takuok/gitbucket,moyfujii/gitbucket,okumin/gitbucket,shiena/gitbucket,team-lab/gitbucket,kanmi/gitbucket,okumin/gitbucket,rantav/gitbucket,garygreen/gitbucket,zhoffice/gitbucket,swaldman/gitbucket,chazmuzz/gitbucket,rabitarochan/gitbucket,dera0520/gitbucket,doron123/gitbucket,shiena/gitbucket,gitbucket/gitbucket,indare/gitbucket,garygreen/gitbucket,mann-ed/gitbucket,skohar/gitbucket,xuwei-k/gitbucket,swaldman/gitbucket,superhj1987/gitbucket,chazmuzz/gitbucket,sekia556/gitbucket,Pfiver/gitbucket,ssogabe/gitbucket,ccskoba/gitbucket,FlYnN91/gitbucket,mcveat/gitbucket,kounoike/gitbucket,takezoe/gitbucket,ssogabe/gitbucket,uli-heller/gitbucket,avldya/gitbucket,gitbucket/gitbucket,gencer/gitbucket,swaldman/gitbucket,hilerchyn/gitbucket,mcveat/gitbucket,rantav/gitbucket,x-way/gitbucket,odz/gitbucket,kanmi/gitbucket,DaniloAndrade/gitbucket,Peterinor/gitbucket,pinghe/gitbucket,oho-sugu/gitbucket,takezoe/gitbucket,rabitarochan/gitbucket,nagase2/gitbucket,doron123/gitbucket,skohar/gitbucket,robinst/gitbucket,imeszaros/gitbucket,McFoggy/gitbucket,avldya/gitbucket,fbelzunc/gitbucket,nagase2/gitbucket,fbelzunc/gitbucket