Even More Precise Bugzilla(TM)

Fix for issue that appeared in `test_custom_dashboards`. The bugzilla associated with that test was moved to ON_QA, therefore disabling skipping. However, this not applies for 5.2 and because the bug does not have copy for target release 5.2, it used the bug from 5.3 target release on it therefore causing failure.

I added 2 additional checks here:
* If the bug's reported version is specified and it is greater than the appliance's version, ignore it
* If the bug's version reported is lower or equal the appliance version, but the appliance version is lower than the target version, skip it too.

There can be a problem since we would rather like to check if "5.2.5.2" belongs to "5.2" series, that would make the checking process even more reliable.