Recent releases of Gerrit have evolved their use of the "topic"
functionality. Originally it was there merely for the convenince
of users. It could be used to make a group of related or similar
changes easy to query. In current releases of Gerrit, it serves
a much more deliberate purpose: if submitWholeTopic is enabled,
then merging one change in a topic will merge all of them
simultaneously.
Since this has very significant impacts to developer workflow,
git-review should no longer set a topic unless it is explicitly
requested by a user.
This change alters the behavior of git-review so that it will no
longer set a topic unless explicitly set by a user. It also
deprecates the 'notopic' and '-T' options. They are retained for
backwards compatability with existing scripts, but no longer have
any effect.
Change-Id: Ib83981a4952e1d6d68ebb8add11aabefbf3b2a4b
c16582058b