This PR introduces support for a lldp module.

lldpd is similar to CDP and can return useful details about a server's network like ports, switches, and VLANs.

Also:
* changed this module to use https for requests to the API
* fixed a bug in which a traceback was caused when the domain wasn't found

Fixes #6457

* Adds another module utility file which generalizes the
  access of urls via the urllib* libraries.
* Adds a new spec generator for common arguments.
* Makes the user-agent string configurable.

Fixes #6211

* Adds another module utility file which generalizes the
  access of urls via the urllib* libraries.
* Adds a new spec generator for common arguments.
* Makes the user-agent string configurable.

Fixes #6211

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.