resulttool: Allow store to filter to specific revisions

resulttool: Allow store to filter to specific revisions

We have a challenge on the autobuilder where test results from both OE-Core
and poky are being mixed together during result storage which is confusing the
data. Add a way to filter to specific revisions as the least worst way to fix
the various issues this is causing.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 3f276a0dc65341668788853be2cf27ab6aa12b13)
Signed-off-by: Steve Sakoman <steve@sakoman.com>