remove keystone extensions from openstackclient functional job
remove keystone extensions from openstackclient functional job

the extensions are enabled by default now, so we no longer need
to specify them in the functional job.

Change-Id: Iec52acddf8ffee7edd70ef7aa7cf3922b0df17e3

noorul/os-project-config,noorul/os-project-config,dongwenjuan/project-config,dongwenjuan/project-config,Tesora/tesora-project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config