bitbucket: Allow to specify the number of repos per api request
This is independent but still, it somehow fixes the issue occurring on #1826 (closed) (at least for the full lister... which is weird...)
Related #1826 (closed)
Depends on !74 (closed) Depends on !75 (closed)
Test Plan
tox docker-dev
Migrated from D1631 (view on Phabricator)