Revert "ceilometer.conf configuration option missing os_auth_url"

patch breaks gate (see any logs/screen-ceilometer-acentral.txt.gz
after this patch)

This reverts commit 4c11089739e6d32b77aea0c8fd2dd3d79570b1c8.

Change-Id: I684d50be1b4d580d385a8bb74b3539b1305ec330
Merge "Revert "ceilometer.conf configuration option missing os_auth_url""