Change 'update default quotas' success and failure messages

Success and failure messages include formatting that adds name,
which makes for awkward phrasing when displayed to the user.
Removed formatting to clarify message text for both success and
failure messages.

Change-Id: Id754ec9cb132ba82c07c13b05c76367739d3faaf
Closes-Bug: #1274654
Merge "Change 'update default quotas' success and failure messages"