Pulp

pulp_installer is not idempotent (always reports changed, and therefore fails molecule CI) on these tasks:

pulp_common : Install pulpcore via PyPI
pulp_common : Install Pulp plugins via PyPI

Upon further investigation, this is caused by:

1. A bug in pip 20.2 (we upgrade to the latest pip) comparing package names with '.' vs '_'
2. The packages ruamel.yaml ruamel.yaml.clib triggering this bug
3. Those 2 packages always getting reinstalled, at the same version, whenever pip installs something that depends on them (drf-yasg, and therefore pupcore and its plugins.) This therefore makes the ansible tasked CHANGED rathe than OK.

Easiest solution is to just have our ansible pip task:

pulp_common: Upgrade to a recent edition of pip (supporting manylinux2014)

Exclude 20.2 specifically. 20.2.1 will almost definitely have a fix for this: The bug report is very active, and there's an open PR to fix it.