Remove unused ResponseMessage objects

Signed-off-by: Dave Liebreich <dliebreich@pivotallabs.com>
Remove obsolete api doc markdown

Signed-off-by: Dave Liebreich <dliebreich@pivotallabs.com>
Fix flakey test assertion. Postgres ordering is not consistent.

Signed-off-by: Dave Liebreich <dliebreich@pivotallabs.com>