Install ansible from git source
Install ansible from git source

Bumps the SHA just past the 2.2.1.0 release to include a fix for
rendering vars to yaml which breaks OSA.

This can be reverted once the next stable release is tagged.

https://github.com/ansible/ansible/commits/stable-2.2
https://github.com/ansible/ansible/issues/20253

Change-Id: I62aaba7d8010415e1953b95ce294ba76400a1b97

robb-romans/openstack-ansible,os-cloud/os-ansible-deployment,yanyao/openstack-ansible,bunchc/openstack-ansible,cloudnull/os-ansible-deployment,BjoernT/openstack-ansible,BjoernT/os-ansible-deployment,openstack/openstack-ansible,yanyao/openstack-ansible,os-cloud/os-ansible-deployment,robb-romans/openstack-ansible,stackforge/os-ansible-deployment,BjoernT/os-ansible-deployment,cloudnull/os-ansible-deployment,bunchc/openstack-ansible,cfarquhar/openstack-ansible,cfarquhar/openstack-ansible,BjoernT/os-ansible-deployment,openstack/openstack-ansible,stackforge/os-ansible-deployment,BjoernT/openstack-ansible