bump timeout to prevent gate failures
bump timeout to prevent gate failures

attempt to fix the transient gate failures by increasing the
timeout

Change-Id: I837652013f94b0d1ed3f4b40fe14ce5a47c687b6

dtroyer/python-openstackclient,openstack/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,openstack/python-openstackclient