Fixes #145: Use FQCN in module docs and in plugin examples.

[geerlingguy]

Closes #145.

This PR includes changes to ensure the module references in module docs refer to other modules by their FQCN so links can work correctly in Ansible's documentation site.

There are also a few more changes to ensure the plugins and a couple modules that weren't updated earlier use the FQCN in their examples.

[codecov]

Codecov Report

Merging #146 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #146   +/-   ##
=======================================
  Coverage   42.41%   42.41%           
=======================================
  Files           3        3           
  Lines         547      547           
  Branches      111      111           
=======================================
  Hits          232      232           
  Misses        271      271           
  Partials       44       44           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9fb808c...881ca3d. Read the comment docs.