It is no longer needed to create `done` wrappers in tests that require
multiple async operations to complete.
Closes gh-4633
(cherry picked from commit 364476c3dc)
This commit fixes unit tests for the following builds:
1. The no-deprecated build: `custom:-deprecated`
2. The current slim build: `custom:-ajax,-effects`
3. The 4.0 (#4553) slim build: `custom:-ajax,-callbacks,-deferred,-effects`
It also adds separate Travis jobs for the no-deprecated & slim builds.
Apart from that, add intuitive names to Travis jobs. Otherwise it's hard to see
at a glance that a particular job is running on Firefox ESR, for example.
Ref gh-4577
Ref gh-4596
Closes gh-4600
