More Jenkins fixes

1.  Fix some incorrect @tags.
2.  Add a script to nuke indexes before running tests so Jenkins'
Elasticsearch doesn't end up full.
3.  Add integration test only setting to speed up periodic job queue tasks
so delayed jobs resolve more quickly.
4.  Drop a flaky test that doesn't really provide any value.
5.  Add some more Templates:Nobel Pipe pages to make sure that is suggested.
6.  Hopefully fix some more tags.

Change-Id: Ifc6a05b63b555388a0220aa52d109a4f77d2c9de
Merge "More Jenkins fixes"