Check changes related to descriptors in a bandwidth file created by a bwauth before next release

In legacy/trac#30733 (moved) we did not create tests for the changes updating descriptors nor dormant mode. Until those tests are implemented, we could change a bwauth to run the latest maint-1.1 branch and look the bandwidth files produced. This way we could avoid some bugs before releasing a new version. Maybe legacy/trac#30899 (moved) should be child of this to know that the bwauth is not running a released version but a git version.