1284884 Overlogging of failed container delete

Currently, when a user tries to delete a non-empty container, an
exception is raised and logged. There really is no need to log this
exception. Instead, the user should be given the error message (which
they are today) and the browser should redirect them back to the
referring page.

Change-Id: If18cee000ec5ac1c741b62e72002139dd087e272
Closes-Bug: 1284884
Merge "1284884 Overlogging of failed container delete"