remove nsCtx from UA_Server struct, UA_Nodestore* now available at server config
remove nsCtx from UA_Server struct, UA_Nodestore* now available at server config

open62541/open62541,open62541/open62541,open62541/open62541,StalderT/open62541,jpfr/open62541,open62541/open62541,JGrothoff/open62541,StalderT/open62541,jpfr/open62541,StalderT/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541