Fix ES tests on amo
(dev|stage)/settings: Upgrade raven and use vanilla client.
Commit from Mozilla Verbatim by user michael.koehler1@gmx.de.: 4985 of 4985 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user markh@babelzilla.org.: 4985 of 4985 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user matjaz@mozilla.com.: 4985 of 4985 strings translated (0 fuzzy).
prevent errors when region is worldwide (bug 962580)

regions.get_region() now returns a region object.
close #1666
Update STATSD_PREFIX for dev. Bug 960269
Get download data from monolith (bug 960809, 962174)
Bump up logging a bit
Merge pull request #1629 from ngokevin/commattachapi

create attachments api (bug 958382)
Show 24hr stats as N/A
Merge pull request #1642 from magopian/fix-es-tests

Fix bug 858447, bug 960598 and bug 961139

* Fix ES tests on amo (bug 858447)
* addons pile up between test runs (bug 960598)
* use cache-machine's LocMemCache backend (bug 961139)
fix clean_slug edge cases
Merge pull request #1614 from magopian/clean-slug-rework

fix clean_slug edge cases (bug 958124)
Re-index both upsell and upsold when one of them changes (bug 956820)
Ensure that API URLs always reverse to the version specified by API_CURRENT_VERSION (bug 963144)
Merge pull request #1669 from chuckharmston/963144-api_reverse_versions

Ensure that API URLs always reverse to the version specified by API_CURRENT_VERSION (bug 963144)
Merge pull request #1670 from diox/reindex-free-app-after-upsold-save

Re-index both upsell and upsold when one of them changes (bug 956820)
Fixes tests broken by b89e5e03
Fix test breakage following 2a5f4e57f9 (upsold is a cached_property)