Remove ssh args to ensure pipelining is working

The ssh args that we have been carrying are overriding
base functionality in Ansible which can cause intermitent
issues. To correct this issue I removed our ssh-args which
will use the default ssh arguments provided by ansible core.

Change-Id: If61d875a58e466ec07cb6818040e83f1612b4f18
Related-Bug: ansible/ansible#9246
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

playbooks/ansible.cfg

@@ -22,4 +22,3 @@ timeout = 120
 
 [ssh_connection]
 pipelining = True
-ssh_args = -o ControlMaster=auto -o ControlPersist=60s -o TCPKeepAlive=yes -o ServerAliveInterval=5 -o ServerAliveCountMax=3