refactor(server): Simplify UA_Server_createSecureChannel
refactor(server): Simplify UA_Server_createSecureChannel

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