* Imports are no longer moved to top.
* `seed-isort-config` is no longer needed.
* Has a `black`-compatible profile/config.
* Also `isorts` the imports anywhere in the code
(not just at the top).
Also bumps `restyled-isort` to newest version
* dvc: get rid of is_walking_tree
No longer needed. Some applications of `isinstance()` will be refactored
in the future, as trees will just provide the needed functionality.
* dvc: move GitTree to dvc/tree/
* dvc: rename *RemoteTree to *Tree
Usually we need it to parametrize tests with, so there is no
reason to duplicate the code. I've left `local_remote` fixture
just because it is so convenient and often used in a lot of tests.
* pylint: enable attribute-outside-init check
* fix tests
* Fix mock for time
This was an interesting one. I was mocking `time` on function definition
and then, using those later on test run. When all the tests were run, there
would be some delay that'd make tests fail. Hmmm ...