senlin-rally-job failed due to private network not shared

[RUIJIE YUAN]

By default, senlin scenario plugin will create a profile with the "private" network.
However, this network is not "shared" between tenants, then the job will raise an exception
called "No network found for private".

Here is the default private network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | nova |
| created_at | 2016-12-13T05:50:27 |
| description | |
| id | 4ed41574-f063-4bb7-9f50-64fe0e6c0ac8 |
| ipv4_address_scope | |
| ipv6_address_scope | |
| mtu | 1450 |
| name | private |
| port_security_enabled | True |
| provider:network_type | vxlan |
| provider:physical_network | |
| provider:segmentation_id | 50 |
| revision | 3 |
| router:external | False |
| shared | False |
| status | ACTIVE |
| subnets | 69471202-abbf-4a87-bb08-73db4596371b |
| | 0673410b-9e75-45ae-a3d9-1b48edee2d85 |
| tags | |
| tenant_id | 19c11bb4a84a4178916a47987002e9eb |
| updated_at | 2016-12-14T01:26:43 |
+---------------------------+--------------------------------------+

And here is the log:
http://logs.openstack.org/33/407433/1/experimental/gate-rally-dsvm-senlin-senlin-ubuntu-xenial-nv/40a896b/console.html#_2016-12-09_08_52_08_755058