[1139735] fix test failures
Now that the storage installer needs to contact the DB to version-stamp the
rhq_storage_node table, the cassandra installer upgrade tests failed, because
they support no DB infrastructure.  To get around this added an installer
option to ignore the version stamping.  These options are not user-visible,
and who knows, maybe someday support will have a reason to use it.

(cherry picked from commit 9ad8a28735c9c9f0a64288f6ffda6973feede014)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>
[1151441] fix i-test failures
We can't cache the server name in the static block because i-tests don't
set rhq.server.high-availbility.name that early in the setup. It was fine
for production. So, now lazily cache the server name at the time
of the first request for server name.

(cherry picked from commit c033e22ac766a573d14a5a54ff73dc7704147483)
Signed-off-by: Jay Shaughnessy <jshaughn@redhat.com>