Description of problem:

if the channels have distinct update chains, adding one channel before the other can result in a different default channel defined at the package level.

Version-Release number of selected component (if applicable):


How reproducible:

always

Steps to Reproduce:
1. create the following update graph
release-1.0
1.0.1 -> 1.0.0
release-1.1
1.1.1 -> 1.1.0
where the 1.0 bundles have "release-1.0" as the default channel and the 1.1 bundles have "release-1.1" as the default channel.

2. add these bundles to an index

Actual results:

non-deterministic default channel

Expected results:

deterministic behavior