added exception for connecting keystone. This fix allows a standard user can activate a cloud without a keystone credential.
added exception for connecting keystone. This fix allows a standard user can activate a cloud without a keystone credential.

rajpushkar83/cloudmesh,rajpushkar83/cloudmesh,rajpushkar83/cloudmesh,rajpushkar83/cloudmesh,rajpushkar83/cloudmesh,rajpushkar83/cloudmesh,rajpushkar83/cloudmesh