All modules should be using /usr/bin/python in the shebang as ansible_python_interpreter processes this (see FAQ).
Fixing for standardization purposes.

- extra properties were not set at creation, only when updating
  which can be overlooked when running the module from more than 1 node...
- fix bas var as time_until_up didn't get used

raise errors when omitted, updated changelog with new modules.

- checks if address already assigned to other node name
- add description for node
- check for node addres changes
- add missing code "node exists, potentially modify attributes"

update with feedback from pull request