added ds service sso session manager

src/python/dm/ds_web_service/service/auth/dsSessionManager.py

+#!/usr/bin/env python
+
+from dm.common.constants import dmRole
+from dm.common.objects.authorizationPrincipal import AuthorizationPrincipal
+from dm.common.db.api.userDbApi import UserDbApi
+from dm.common.service.auth.sessionManager import SessionManager
+from dm.ds_web_service.api.dsRestApiFactory import DsRestApiFactory
+
+
+class DsSessionManager(SessionManager):
+
+    def __init__(self):
+        SessionManager.__init__(self, self.__class__.__name__)
+        self.authApi = DsRestApiFactory.getAuthRestApi()
+
+    def addSession(self, sessionId, sessionInfo):
+        return self.authApi.addSession(sessionId, sessionInfo)
+
+    def checkSession(self, sessionId):
+        return self.authApi.checkSession(sessionId)
+
+#######################################################################
+# Testing.
+if __name__ == '__main__':
+    pass
+