This reverts commit 41756165.

Fix syntax error in selectors

.attr() now returns a string (though it can still be passed an integer)

Fixes checkbox test failures

Remove remaining references to jquery.min (in wrong folder)

$.ajax now returns 422 if type is json and body is not JSON, e.g. ''

Substitute prop for attr

Remove references to jquery.min, add jquery.migrate (again)

"Fix" jquery karma config

This wasn't suppoed to survive the merge

This throws an error when called with an 'undefined' error

Fix Karma warning about [re|un]loading the window

Fix path for jquery in cms-squire tests

Move jasmine.clock.uninstall() to afterEach so it runs even on failure

Fix test failing due to timezone issues

Do the timeout before the window scrolling (so handler will not be _.throttled)

Fix an alert() triggered by window.onBeforeUnload while testing in Chrome

FEDX-25

set max_num_courses_in_cache on modulestore

Files which are loaded via RequireJs do not need to be individually
declared in karma config files. If we give karma directories,
it will serve all the files in them.

The config files just declare lists of files.

By default, disable all caching in tests, to preserve test independence.
In order to enable caching, inherit from CacheSetupMixin, and specify
which cache configuration is needed.

[EV-32]

Instead, use a class attribute to define test behavior. This allows for
easier addition of new mixins over time.