AutoDeploy::MinimumCommit contstuctor expected a branch name as a
parameter, the class was designed to work with an auto-deploy branch
name, but in its only usage in the code, we were sending master, as
the source branch for finding the next auto-deploy branch commit
candidate.

Because of this we were searching tags on release-tools with no
filters, finding some very old tags starting with a "v"
- v2020-11-04
- v2020-02-28
- v2020-02-18
- v12.0.0-pre

Those tags are not coordinated pipelenes, hence the system was not
able to figure out the minimum commit.

With this change the AutoDeploy::MinimumCommit contstuctor no longer
requires a branch name. The class will simply find the latest tag on
realese-tools and search for the connected package.