Fix selef to self in class.

Change-Id: I1fec9908fb1aa915158996d57fdd82cfdf483535
Update oslo-config version.

Update the version of oslo-config in pip-requires.  This update includes
a fix for a bug that breaks oslo.config imports.

Change-Id: If36de2965a50a975437bc498d9894325e6d20e98
Merge "Update oslo-config version."