Require oslo.config 1.2.0 final
Require oslo.config 1.2.0 final

Now that 1.2.0 has been released, require it rather than on of the beta
release tarballs.

Closes-Bug: #1182861
Change-Id: I75ffc4a572d14488d19491a38742d6920951c171

jamielennox/python-keystoneclient,klmitch/python-keystoneclient,jamielennox/python-keystoneclient,jamielennox/python-keystoneclient,Mercador/python-keystoneclient,ging/python-keystoneclient,ntt-sic/python-keystoneclient,darren-wang/ksc,alexpilotti/python-keystoneclient,metacloud/python-keystoneclient,citrix-openstack-build/python-keystoneclient,klmitch/python-keystoneclient,ging/python-keystoneclient,ntt-sic/python-keystoneclient,Mercador/python-keystoneclient,darren-wang/ksc,magic0704/python-keystoneclient,ntt-sic/python-keystoneclient,citrix-openstack-build/python-keystoneclient,sdpp/python-keystoneclient,magic0704/python-keystoneclient,alexpilotti/python-keystoneclient,citrix-openstack-build/python-keystoneclient,metacloud/python-keystoneclient,sdpp/python-keystoneclient