* Moving comparision functions to compare.py from common.py
* Refactors main() function and module manager in multiple modules in line with recent changes
Adds variable types to docs
Refactors unit tests to remove deprecated parameters
* Move ansible.compat.tests to test/units/compat/.
* Fix unit test references to ansible.compat.tests.
* Move builtins compat to separate file.
* Fix classification of test/units/compat/ dir.
This patch is primarily a refactor to make the validate-modules arg-spec
no longer generate a traceback. It additionally includes removal of deprecated
code in the virtual server module.
