When deploying with tls enabled in public
endpoints, ansible modules fails due SSL certificates
are self-signed.

This change adds a new variable to allow customization
on which endpoints ansible should connect.
Defaults to admin because admin auth parameters defaults
to admin endpoint.

Change-Id: Ic3ed58cf9c9579cae08a11bbfe6fce983b5a9cbc
Closes-Bug: #1720995

nova quota fail to create due a recent change.
Keystone endpoint cannot have version v3 in the url.

During upgrade to Pike nova endpoint must be changed
to be versionless.

Change-Id: Idb433d526f7d44dfe4fd02ee918bd67e05c523f6
Depends-On: I568db4559428525ac6c5083cfc20cffc20be6342
Closes-Bug: #1668663