* Refactor dimensiondata_network to use shared base class for common functionality.
* Experiment: remove the assignments in the "except ImportError:" block that keep PyCharm happy. If this fixes the build, then I reckon there's a bug in the validate-modules script (https://github.com/ansible/ansible/blob/devel/test/sanity/validate-modules/validate-modules#L322).
* Remove unused imports.
* Changes based on feedback from @gundalow for ansible/ansible#21043.
- Use no_log=True for mcp_password parameter.
- Collapse module parameter definitions.
* Use shared definitions and doc fragments for common module arguments (ansible/ansible#21043).
* Make default network plan "ESSENTIALS", rather than "ADVANCED" (this is consistent with our other tooling).
Tidy up module parameter documentation.
* Simplify dimensiondata module documentation fragments (didn't know you could include multiple fragments).
* Change 'verify_ssl_cert' module parameter to 'validate_certs'.
Adam Friedman