* Initial (re)implementation of dimensiondata_vlan module.
This module was rewritten because the original implementation was imperative rather than declarative (which is the preferred style, and consistent with our other modules).
Credit for the original module implementation goes to Aimon Bustardo (@aimonb).
* Remove unused imports.
* Improve error message and documentation around expansion of a VLAN's private IPv4 network.
* Split message string over 2 lines.
* Add check_mode support to dimensiondata_vlan module.
ansible/ansible#21218
* Fix errors / warnings reported by Ansible sanity tests.
ansible/ansible#21218
* Remove 'metadata_version' key from documentation.
ansible/ansible#21218
* Return changed=True when changes would be made.
ansible/ansible#21218
Dag Wieers
Adam Friedman