This reverts commit 67630d4c52aef5ddcb15cff4f3b6594d447e8992.
Reason for revert: Seeing random failures across jobs as sometimes
'keyring_pass.cfg' gets duplicated keys and that makes executions
of any openstackclient command to fail until the file is removed.
This should be handled before re enabling the token caching again.
Change-Id: I3d2fe53a2e7552ac6304c30aa2fe5be33d77df53
Related-Bug: #2042943