Update .gitreview for oslo.
Update .gitreview for oslo.

At the Design Summit it was decided that the OpenStack common modules
would be named Oslo as part of an effort to convert them into a core
project housing a collection of library dependencies. This handles the
necessary update to .gitreview reflecting the new remote name.

Change-Id: I350ff95213efe85579bc6fdce125237cb1f7f614

JioCloud/oslo-incubator,JioCloud/oslo-incubator,JioCloud/oslo-incubator