Small fixes for utils/{common_filters,common_params_for_list}

This is a follow-up of https://review.openstack.org/#/c/114555
addressing comments that were not addressed there.

* Add docstrings for both functions
* Make common_params_for_list check for correct limit
* Improve uint-tests coverage

Change-Id: I33bbb4eac4a91a935b42521b9c63e6ce2118cb31
Bump hacking version

Current hacking version is incompatible with the one in the
global requirements. Match the hacking module version and made the
necessary changes to pass the tests.

Change-Id: Ie6b13a4ea112084d4c50dc27f97329dfad5777a1
Merge "Small fixes for utils/{common_filters,common_params_for_list}"
Stop using intersphinx

Remove intersphinx from the docs build as it triggers network calls that
occasionally fail, and we don't really use intersphinx (links other
sphinx documents out on the internet)

This also removes the requirement for internet access during docs build.

This can cause docs jobs to fail if the project errors out on
warnings.

Change-Id: I71e941e2a639641a662a163c682eb86d51de42fb
Related-Bug: #1368910