* ansible-test - Clarify need for empty __init__.py
* ansible-test - Update code-smell boilerplate.
* Update code-smell boilerplate for core.
* Update future boilerplate test for ansible-test.
All ansible-test code (except for targets) and core-specific sanity tests now use the same boilerplate.
The test also checks for unwanted `__future__` and `metaclass` boilerplate.
* Relocate target tools to the correct directory.
Several tools used on target Python versions were incorrectly placed in the controller directory.
