changelog-generator: Add parameter to include all integrated projects
Before this, the changelog was generated on a given list of projects, all using the same branch. The new parameter now goes the the specified projects from the parameters, and detects all integrated projects into this. So normally you would specify one or two manifest projects, everything else is automatically added to the list.
This also handles different branch names. As for example the kernel branches are different, the integration branch is used instead of the branch from the command line.