Remove barbican plugin from magnum
Remove barbican plugin from magnum

barbican plugin has been added to magnum devstack plugin, remove to aviod
setup barbican the second time.
see I7d2620888bef3ae6bcc34c333ef3a935245195cf

Change-Id: I32cf26426b77eb76083363ae624c45ae764d1383
Closes-Bug: #1498797

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