Update WebOb version specification
Update WebOb version specification

Now that the other projects are using WebOb>=1.2 we can
specify that, too.

See bug #1092227 for details.

Change-Id: Ifcb99354f405d9f4dc113d01d83b2a9d76660fc5
Signed-off-by: Doug Hellmann <8c845c26a3868dadec615703cd974244eb2ac6d1@dreamhost.com>

tanglei528/ceilometer,openstack/ceilometer,dreamhost/ceilometer,fabian4/ceilometer,ityaptin/ceilometer,MisterPup/Ceilometer-Juno-Extension,tanglei528/ceilometer,isyippee/ceilometer,citrix-openstack-build/ceilometer,mathslinux/ceilometer,Juniper/ceilometer,fabian4/ceilometer,MisterPup/Ceilometer-Juno-Extension,citrix-openstack-build/ceilometer,NeCTAR-RC/ceilometer,cernops/ceilometer,r-mibu/ceilometer,openstack/aodh,NeCTAR-RC/ceilometer,openstack/ceilometer,idegtiarov/ceilometer,rackerlabs/instrumented-ceilometer,luogangyi/Ceilometer-oVirt,cernops/ceilometer,tanglei528/ceilometer,isyippee/ceilometer,JioCloud/ceilometer,maestro-hybrid-cloud/ceilometer,eayunstack/ceilometer,dreamhost/ceilometer,froyobin/ceilometer,rickerc/ceilometer_audit,redhat-openstack/ceilometer,JioCloud/ceilometer,m1093782566/openstack_org_ceilometer,m1093782566/openstack_org_ceilometer,rickerc/ceilometer_audit,pczerkas/aodh,chungg/aodh,pkilambi/ceilometer,mathslinux/ceilometer,JioCloud/ceilometer,idegtiarov/ceilometer,pkilambi/ceilometer,shootstar/ctest,sileht/aodh,pczerkas/aodh,redhat-openstack/ceilometer,rackerlabs/instrumented-ceilometer,citrix-openstack-build/ceilometer,chungg/aodh,shootstar/ctest,NeCTAR-RC/ceilometer,maestro-hybrid-cloud/ceilometer,rickerc/ceilometer_audit,Juniper/ceilometer,eayunstack/ceilometer,ityaptin/ceilometer,luogangyi/Ceilometer-oVirt,froyobin/ceilometer,r-mibu/ceilometer,sileht/aodh,openstack/aodh,rackerlabs/instrumented-ceilometer