Switch to final 1.1.0 oslo.config release
Switch to final 1.1.0 oslo.config release

Fixes bug #1128256

oslo.config has now been released to PyPI in time for Grizzly RC1 so
we can switch to using it directly.

Change-Id: I655f831718ae5f4e25e941ee206fe195214a9a91

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