service: Helper for sending generic RPC errors
service: Helper for sending generic RPC errors

We'll need such further.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

gablg1/criu,kawamuray/criu,AuthenticEshkinKot/criu,ldu4/criu,KKoukiou/criu-remote,gablg1/criu,KKoukiou/criu-remote,biddyweb/criu,sdgdsffdsfff/criu,rentzsch/criu,gonkulator/criu,efiop/criu,KKoukiou/criu-remote,gablg1/criu,marcosnils/criu,gonkulator/criu,biddyweb/criu,fbocharov/criu,biddyweb/criu,marcosnils/criu,gablg1/criu,KKoukiou/criu-remote,efiop/criu,fbocharov/criu,eabatalov/criu,wtf42/criu,fbocharov/criu,fbocharov/criu,KKoukiou/criu-remote,wtf42/criu,wtf42/criu,gonkulator/criu,eabatalov/criu,tych0/criu,kawamuray/criu,eabatalov/criu,fbocharov/criu,biddyweb/criu,LK4D4/criu,marcosnils/criu,sdgdsffdsfff/criu,AuthenticEshkinKot/criu,rentzsch/criu,tych0/criu,svloyso/criu,wtf42/criu,efiop/criu,AuthenticEshkinKot/criu,kawamuray/criu,sdgdsffdsfff/criu,marcosnils/criu,tych0/criu,wtf42/criu,eabatalov/criu,LK4D4/criu,LK4D4/criu,rentzsch/criu,marcosnils/criu,kawamuray/criu,tych0/criu,LK4D4/criu,gonkulator/criu,sdgdsffdsfff/criu,wtf42/criu,tych0/criu,svloyso/criu,efiop/criu,kawamuray/criu,KKoukiou/criu-remote,gablg1/criu,rentzsch/criu,ldu4/criu,rentzsch/criu,AuthenticEshkinKot/criu,svloyso/criu,AuthenticEshkinKot/criu,biddyweb/criu,LK4D4/criu,gablg1/criu,marcosnils/criu,tych0/criu,rentzsch/criu,svloyso/criu,svloyso/criu,svloyso/criu,efiop/criu,ldu4/criu,sdgdsffdsfff/criu,biddyweb/criu,gonkulator/criu,AuthenticEshkinKot/criu,eabatalov/criu,ldu4/criu,LK4D4/criu,ldu4/criu,sdgdsffdsfff/criu,gonkulator/criu,eabatalov/criu,efiop/criu,ldu4/criu,fbocharov/criu,kawamuray/criu