Remove unnecessary oauth1.Manager constructions

There's an oauth1.Manager kept in the global dependency that's
created when the oauth1 extension is loaded due to being in the
paste pipeline, so there's no need to create more of them.

Closes-Bug: #1291705
Change-Id: I78e19e3b165b4cd503e2da6a135daa54e98de599
Updated from global requirements

Change-Id: I1733a270d488b807183c6ff29226a93fd994e741
Merge "Remove unnecessary oauth1.Manager constructions"
Merge "Updated from global requirements"