Replace the usage of 'admin_manager' with 'os_admin'

In tempest, alias 'admin_manager' has been moved to 'os_admin'
'alt_manager' to 'os_alt' and 'manager' to 'os_primary' in
version Pike, and it will be removed in version Queens[1].


[1]I5f7164f7a7ec5d4380ca22885000caa0183a0bf7

Closes-bug: 1697588

Change-Id: Ib41a1bcff70cc7323b90a222c9f64d66e0203e53
11 files changed
tree: 0c7302c820662d2ab0984c75ff0c5c3050af5528
  1. neutron/