Add a RefreshLinks job when a template is deleted

When a template is deleted, all pages transcluding it need to be
reparsed so that entries for transcluding pages in the various links
tables due to the transcluded content are properly removed.

Bug: 5382
Change-Id: I838b546caa3f5887e6bd312017c1fa71d3c3463a
Merge "Add a RefreshLinks job when a template is deleted"