Workflow parse delivery json

Makes workflow service look for and handle a delivery.json file if it should appear in the HTCondor working directory after a workflow is complete.

Also reduced message logging a bit and made notifications from the capability service not so needy about user_email parameters.

apps/cli/executables/delivery/delivery/destinations/checksum.py

@@ -57,3 +57,6 @@ class ChecksumDecorator(DestinationDecorator):
 
         # now proceed
         super().close()
+
+    def __str__(self):
+        return str(self.underlying) + " with SHA1SUM"