Fix reclaim on deleted containers

The common db replicator's code path for reclaiming deleted db's beyond the
reclaim age was not covered by unittests, and a AttributeError snuck in.  In
writing the test that would cover the common code both for accounts and
containers I discovered another KeyError with the container conditional for
validating the container's fully reported status.

This fixes both those issues and adds additional tests for the cleanup empty
account container partition and suffix directories.

Change-Id: I2a1bfaefebd05b01231bf71dd908fcc49adb4c36
Merge "Fix reclaim on deleted containers"