Updated openstack/openstack
Project: openstack/tempest  5f93d37ed1756998ce4ee2368e74bb600f7d5cdc

Remove unused TOKEN_CHARS_RE

TOKEN_CHARS_RE is not used in rest_client.py, and this patch
removes it.

Change-Id: I33db1b937efc6393d979da6c3f6b55cf31b5779c