NEW: Created new Bag Completion task that uses tag files service instead of BagIt completers.
FIXED: Removed a potential for NPE in BagCompletionTask
FIXED: Closed inputstream after saving to disk in SaveInputStreamTask
CHANGED: Allowed idle thread pool to have multiple threads.
FIXED: Unable to move preservation file issue.
Fixed a null pointer exception issue when logging in via Shibboleth for
the first time.  Also added a Logout Success Handler so that Shibboleth
users are logged out of the SP and thus the Data Commons.
Merge branch 'master' into shibboleth