Null checks for RegistrationCenter in update machine API [MOSIP-29696]#1206

GOKULRAJ136 wants to merge 2 commits intomosip:release-1.3.xmosip/admin-services:release-1.3.xfrom

GOKULRAJ136:DSL-144-13xGOKULRAJ136/admin-services:DSL-144-13xCopy head branch name to clipboard