addressing race condition between loop_send exit and DONE message delivery.

tests/test_components.py

@@ -77,7 +77,6 @@ class ComponentTestCase(TestCase):
             DATASOURCE_UNFRAME
         )
 
-
         for event in comp_a:
             log.info(event)
 
@@ -155,6 +154,9 @@ class ComponentTestCase(TestCase):
 
         sorted_out = date_sorted_sources(*sources)
 
+        import time
+        time.sleep(.25)
+
         prev = None
         sort_count = 0
         for msg in sorted_out: