* added metadata for variables in module helper
* adjustments
* added separate support for tracking changes
* rewrote the diff code
* added integration test for module_helper
* using ansible.module_utils.common.dict_transformations.dict_merge
* improved dependency management
* restore ModuleHelper to base classes of CmdStateModuleHelper
* added assertions to ensure the failing module name appears in the error messages
* added test code for state-based modules
* fixed test name
* renamed class to VarMeta
* small fixes
* fixes from the PR
* fixed VarDict.__set_attr__
* added VarDict.__getitem__()
* added changelog fragment
* adjustments per PR
* ModuleHelper.output is now aware of conflicting variable names
* Update plugins/module_utils/module_helper.py
Co-authored-by: Felix Fontein <felix@fontein.de>
Co-authored-by: Felix Fontein <felix@fontein.de>
