Our group fabrication creates groups with name "my_group_#{n}" where n
is the sequence number of the group being created. However, this can
cause the test to be flaky if and when a group with name `my_group_10`
is created as it will be ordered before
`my_group_9`. This commits makes the group names determinstic to
eliminate any flakiness.
This reverts commit 558bc6b746928a1fcdb2773b0447ea4a57aa7419.