Fixes #7088/BZ1130224: reload filter after saving date range errata.

After saving the rule it was being replaced by the previous value
that was stored in the fitler.  This commit reloads the filter so
that the rule is current.

http://projects.theforeman.org/issues/7088
https://bugzilla.redhat.com/show_bug.cgi?id=1130224
Merge pull request #4581 from waldenraines/7088

Fixes #7088/BZ1130224: reload filter after saving date range errata.