WP141 #1126 Update method return types for initialization
requested to merge 1126-3-wp141-bug-empl-student-gets-page-in-w4-when-profile-url-is-not-set into master
Adjusted return types in Person class and ScimConnector to use ScimRecord|NULL|FALSE to handle all cases uniformly.
Initialized statusCode with 0 and modified getStatusCode to return int|null in ApiConnectorPluginBase.