Implemented fact scan storage logic.

* added mongo connection logic
* added mongo dbtransform logic to allow keys with . and $
* altered tower fact scanner CacheModule to emit a message for each fact module facts (including ansible facts). Previously, seperate facts module facts were getting concatenated to each subsequent emi
* tower fact scanner CacheModule timeout set as to not hang for forever
* broke apart commands.py test
* added unit test for run_fact_cache_receiver, facts, and dbtransform

awx/settings/defaults.py

@@ -7,6 +7,8 @@ import glob
 from datetime import timedelta
 import tempfile
 
+MONGO_DB = 'system_tracking'
+
 # Update this module's local settings from the global settings module.
 from django.conf import global_settings
 this_module = sys.modules[__name__]