Fixes bug lp:821296
Fixes bug lp:821296

Fixed exclude-dir to point to glance/tests/functional, now --unittests-only runs properly.

Change-Id: I237225fb49f1f4a284682768e888a2e03585cdf9

jumpstarter-io/glance,kfwang/Glance-OVA-OVF,darren-wang/gl,takeshineshiro/glance,dims/glance,akash1808/glance,rickerc/glance_audit,jumpstarter-io/glance,wkoathp/glance,openstack/glance,SUSE-Cloud/glance,ozamiatin/glance,redhat-openstack/glance,wkoathp/glance,tanglei528/glance,darren-wang/gl,vuntz/glance,sigmavirus24/glance,sigmavirus24/glance,openstack/glance,klmitch/glance,ntt-sic/glance,cloudbau/glance,cloudbau/glance,takeshineshiro/glance,vuntz/glance,akash1808/glance,saeki-masaki/glance,citrix-openstack-build/glance,ntt-sic/glance,scripnichenko/glance,klmitch/glance,paramite/glance,citrix-openstack-build/glance,stevelle/glance,rajalokan/glance,ozamiatin/glance,scripnichenko/glance,paramite/glance,SUSE-Cloud/glance,saeki-masaki/glance,rickerc/glance_audit,openstack/glance,dims/glance,rajalokan/glance,redhat-openstack/glance,tanglei528/glance,JioCloud/glance,stevelle/glance,JioCloud/glance,kfwang/Glance-OVA-OVF