* Port mozilla/amo-loadtest to FXA authentication and WebExtensions.
This is the first part of many to improve our load-tests and allow them
to be run regularly as part of a regression test suite.
This commit primarily ports the existing tests over to our repository,
updates them to use FxA authentication and uses a WebExtension for the
upload test.
This only implements the baseline for more work to come in #7744 but
it's important to have authentication and the basic infrastructure
working correctly.
It's also still using the legacy add-on detail and listing pages,
that'll obviously change - or be only true for SeaMonkey and Thunderbird
related tests since we still have to support them (very low priority though)
It also adds a first step of a summary report that links to new-relic.
That'll need a bit more tooling and testing but it worked quite well in
first tests.
Refs #7744
Next steps:
* Implement most of the read-only tests from #7744
* Check what needs auth in #7744, implement it properly
* Implement database and cache query logging
* Implement a unified merged test-report that uses the database and
cache query logging and merges it with locust logs (using our new
unique request id)
* Fix makefile, show dummy-usage for now.
* Delete generate-summary script for now
* Pin and cleanup dependencies
* Reverse all urls
Christopher Grebs