Use checksum to detect RPM changes and drop the use of --archive

The --archive option includes --times implicitly that preserves modification
time and results in all RPMs being thought of as changed. Instead we explicitly
define the options that are included in --archive and drop the use of --times.

upload_stage_rpms

@@ -5,4 +5,4 @@
 USER='yumrepostage'
 HOST='web01.osuosl.theforeman.org'
 
-rsync --archive --verbose --partial --one-file-system --delete-after "tmp/$PROJECT/$VERSION" "$USER@$HOST:rsync_cache/$PROJECT"
+rsync --checksum --perms --recursive --links --verbose --partial --one-file-system --delete-after "tmp/$PROJECT/$VERSION" "$USER@$HOST:rsync_cache/$PROJECT"