Fix search_projects docstring
Fix search_projects docstring

The method returns a list of projects, not roles

Change-Id: I8ce4c8a5ab5fa6adbba4dd3f925e0b0528dae37d

stackforge/python-openstacksdk,openstack-infra/shade,dtroyer/python-openstacksdk,openstack-infra/shade,openstack/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,stackforge/python-openstacksdk