Partition Assignments are still non uniform for apps with table_standby_replicas=0

[patkivikram]

Checklist

• [ x] I have included information about relevant versions
• [ x] I have verified that the issue persists when using the master branch of Faust.

Steps to reproduce

For a simple app with no tables, single topic and table_standby_replicas=0 in the app configuration with # of partitions are equal to the number of workers, some of the workers do not get any partitions assigned and remain idle.
We were expecting this to be fixed by PR 97, but we are still running into it

Expected behavior

Each worker should get the minimum number of partitions(1)

Actual behavior

Some workers got 2 partitions and some got 0

Versions

• Python version 3.9
• Faust version 0.9.1