there is no point in making read-only gerrit remotes. use gitorious for
that.
instead, create remotes which rely on proper ssh configuration if
--codereview-username is not passed.

Change-Id: I08812fd26f1de6df22cd952211f620f36f069e51
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>