Raise max header size to accommodate large tokens
Raise max header size to accommodate large tokens

Related-Bug: #1190149

Change-Id: I14a64c538b8d35549747ae74c2aea192fccbed9b

weiting-chen/manila,sajuptpm/manila,NetApp/manila,jcsp/manila,redhat-openstack/manila,openstack/manila,vponomaryov/manila,jcsp/manila,vponomaryov/manila,openstack/manila,scality/manila,weiting-chen/manila,scality/manila,sajuptpm/manila,NetApp/manila,bswartz/manila,redhat-openstack/manila,bswartz/manila