update: reactivated tests on inbox

Tests on circle members still need to be rewritten

djangoldp/tests/runner.py

@@ -32,7 +32,7 @@ failures = test_runner.run_tests([
     'djangoldp.tests.tests_delete',
     'djangoldp.tests.tests_sources',
     'djangoldp.tests.tests_pagination',
-    # 'djangoldp.tests.tests_inbox',
+    'djangoldp.tests.tests_inbox',
     'djangoldp.tests.tests_backlinks_service',
     'djangoldp.tests.tests_cache'
 ])