Add resource_definition and src params

[chouseknecht]

• module_utils/k8s_common.py now supports resource definition and src params
• Fixes role name in README
• Object compare seems to be return False, even though the dictionary representations are an exact match, as far as I can tell
• Clean up lots of small things
• Added attribute_to_snake() method for converting object property names to snake case. When reading a resource definitions on the module side, we may receive camel case, and need to convert it. This keeps us from having to import string_utils at the module level.

[fabianvf]

Unless I'm mistaken this will use up the generator

[chouseknecht]

o. that maybe true. that would not be good.