Failed to import exisitng cluster in RHGS Web Administration

Issue

• Red Hat Storage Web Administration can not import existing gluster cluster.
• Following error messages can be seen :

Failure in Job 01f7e00a-0d9a-46e4-9b97-75f75270e23b Flow tendrl.flows.ImportCluster with error: Traceback (most recent call last): File "/usr/lib/python2.7/site-packages/tendrl/commons/jobs/__init__.py", line 240, in process_job the_flow.run() File "/usr/lib/python2.7/site-packages/tendrl/commons/flows/import_cluster/__init__.py", line 131, in run exc_traceback) FlowExecutionFailedError: ['Traceback (most recent call last):\n', ' File "/usr/lib/python2.7/site-packages/tendrl/commons/flows/import_cluster/__init__.py", line 98, in run\n super(ImportCluster, self).run()\n', ' File "/usr/lib/python2.7/site-packages/tendrl/commons/flows/__init__.py", line 144, in run\n (atom_fqn, self._defs[\'help\'])\n', 'AtomExecutionFailedError: Atom Execution failed. Error: Error executing pre run function: tendrl.objects.Node.atoms.IsNodeTendrlManaged for flow: Import existing Gluster Cluster\n'