Needn't workaround when invoking `app.request()`
Needn't workaround when invoking `app.request()`

As the issue has been fixed in webtest, we needn't do the workaround
anymore when invoking `app.request`.

Change-Id: I06821c9b5d16d98e888aae329b9c9458d02e86f0

rajalokan/keystone,himanshu-setia/keystone,roopali8/keystone,himanshu-setia/keystone,openstack/keystone,mahak/keystone,nuxeh/keystone,roopali8/keystone,klmitch/keystone,promptworks/keystone,rajalokan/keystone,cernops/keystone,rushiagr/keystone,dstanek/keystone,idjaw/keystone,rushiagr/keystone,openstack/keystone,rajalokan/keystone,idjaw/keystone,vivekdhayaal/keystone,mahak/keystone,dims/keystone,jonnary/keystone,jumpstarter-io/keystone,jumpstarter-io/keystone,vivekdhayaal/keystone,jumpstarter-io/keystone,jamielennox/keystone,openstack/keystone,cernops/keystone,promptworks/keystone,ilay09/keystone,vivekdhayaal/keystone,dstanek/keystone,ajayaa/keystone,ilay09/keystone,jamielennox/keystone,takeshineshiro/keystone,klmitch/keystone,dims/keystone,mahak/keystone,promptworks/keystone,takeshineshiro/keystone,ilay09/keystone,dstanek/keystone,maestro-hybrid-cloud/keystone,maestro-hybrid-cloud/keystone,ajayaa/keystone,nuxeh/keystone,nuxeh/keystone,jonnary/keystone,rushiagr/keystone