* Porting tests to pytest
* Achievement Get: No longer need mock/generator.py
* Now done via pytest's parametrization
* Port safe_eval to pytest
* Port text tests to pytest
* Port test_set_mode_if_different to pytest
* Change conftest AnsibleModule fixtures to be more flexible
* Move the AnsibleModules fixtures to module_utils/conftest.py for sharing
* Testing the argspec code requires:
* injecting both the argspec and the arguments.
* Patching the arguments into sys.stdin at a different level
* More porting to obsolete mock/procenv.py
* Port run_command to pytest
* Port known_hosts tests to pytest
* Port safe_eval to pytest
* Port test_distribution_version.py to pytest
* Port test_log to pytest
* Port test__log_invocation to pytest
* Remove unneeded import of procenv in test_postgresql
* Port test_pip to pytest style
* As part of this, create a pytest ansiblemodule fixture in
modules/conftest.py. This is slightly different than the
approach taken in module_utils because here we need to override the
AnsibleModule that the modules will inherit from instead of one that
we're instantiating ourselves.
* Fixup usage of parametrization in test_deprecate_warn
* Check that the pip module failed in our test
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