Fix execute status of cleanup script files

cleanup.py should be executable, cleanup_service.py is a module.

Change-Id: Ibb8e06a0165d9b2f42c1aeec8bf639227a5480d3
Remove AltManager class from client

As Change-Id: I280f2b1659c593e14ab9213a161b55bcfc08fa5c has modified
the Manager instantiation for non isolated tenant, AltManager class
is no more needed.

Tests runs for non isolated by instantiating the Manager with 'alt'
credential.

This patch removes the class AltManager from client.py

Closes-Bug: #1329065

Change-Id: I0dcf4050d8524655b017b4b5308fe3070aa2f840
Fix missing usage of the xml neutron clients

This commit adds a conf check for a use of the neutron xml clients
which is outside of the network api tests. This is causing failures
when the neutron xml api is not available.

Change-Id: I51ca8c5ceb65d4ed07b17ed3c1895eeef1c54878
Merge "Fix missing usage of the xml neutron clients"
Merge "Fix execute status of cleanup script files"
Merge "Remove AltManager class from client"
Merge branch 'master' of https://github.com/openstack/tempest