Update network.py

Update data as required due to network interface changes. Thanks to help from @cgoudie.
Document the `env` arg for cmdmod functions, Fix #5772
Merge pull request #5789 from jhutchins/patch-2

Update network.py
Trigger the controlling minion process to refresh grains also
Merge pull request #5792 from basepi/envdoc5772

Document the `env` arg for cmdmod functions, Fix #5772
Update network.py

refresh instead of reload
Merge pull request #5797 from cgoudie/patch-1

Update network.py
Adapted the tests suite to work with salt-testing
Remove the now unnecessary `saltunittest`. Moved remaining functionality to `integration`.
Adapted code fix `sys.path` in case called from `__main__`. Adapted to salt-testing.
Make sure every test module is runnable by `__main__`.

* Double to single quotes
Install Salt Testing from git
Update `sys.path` before import salt. This way salt does not need to be installed.
Update copyright years of changed files. Added `__main__` execution to `tests/integration/states/pip.py`.
Added support for `__main__` execution and formatting fixes.
Added support for `__main__` execution and formatting fixes.
Added support for `__main__` execution and formatting fixes.
Added support for `__main__` execution and formatting fixes.
Added support for `__main__` execution.
Only update `sys.path` once.