Description of problem: Docker plugin is the optional plugin. User may install it or not, as well as uninstall. Tab completion should support such situations.
We recommend doing this instead of 1148789.
Michael, it's obvious ;)
https://github.com/pulp/pulp/pull/1225
fixed in pulp 2.6.0-0.2.beta
Moved to https://pulp.plan.io/issues/257