Revert "Fix tests altering databases for jenkins"

This reverts commit fe79b39d219a204044cb03128aadf390b9d2b9dc.

(This actually made things even worse for jenkins)
whitespace
try to quiet jenkins test failure
Cleaner attempt to fix translations multidb tests on jenkins
Fix TestLanguagePack tests by mocking only when necessary

(test failures following safe_signals removal)
Make update_incompatible_versions() reload the addon before trying to use it

Fixes addons.tests.test_models:TestAddonModels.test_no_change_deleted following
safe_signals removal.
use .gitkeep instead of .gitignore; bug 687408
Try fixing mkt.stats.tests.test_views failures by mocking search indexing
Fix for editors.tests.test_views.TestPendingQueue.test_get_queue
missed a possible None in es_app_to_dict
Commit from Mozilla Verbatim by user jasnapaka@jasnapaka.com.: 4945 of 5474 strings translated (5 fuzzy).
add italian (bug 918560)
document ?region in search API (bug 917500)
fix field names in search.rst
Don't apply filters to Collections API when pk/slug/etc lookup is used (bug 915801)
Merge pull request #1163 from diox/collections-dont-filter-lookups

Don't apply filters to Collections API when pk/slug/etc lookup is used (bug 915801)
Commit from Mozilla Verbatim by user petercpg@mail.moztw.org.: 5047 of 5474 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Commit from Mozilla Verbatim by user mdinic@mozilla.com.: 406 of 5474 strings translated (2 fuzzy).
remove paypal check