Re-Revert "Revert "Migrates alarms to MongoDB"" approved by TSC

This reverts commit 628df021896fa8775f9743af62a4267b617cc35c.

Change-Id: Ie07a6856ee3f2e15c539d52afc4c7e5ecc07ca95
diff --git a/osm_mon/cmd/mon_evaluator.py b/osm_mon/cmd/mon_evaluator.py
index 3835d7e..ba9a420 100644
--- a/osm_mon/cmd/mon_evaluator.py
+++ b/osm_mon/cmd/mon_evaluator.py
@@ -26,13 +26,12 @@
 import sys
 
 from osm_mon.core.config import Config
-from osm_mon.core.database import DatabaseManager
 from osm_mon.evaluator.evaluator import Evaluator
 
 
 def main():
-    parser = argparse.ArgumentParser(prog='osm-policy-agent')
-    parser.add_argument('--config-file', nargs='?', help='POL configuration file')
+    parser = argparse.ArgumentParser(prog='osm-mon-evaluator')
+    parser.add_argument('--config-file', nargs='?', help='MON configuration file')
     args = parser.parse_args()
     cfg = Config(args.config_file)
 
@@ -48,9 +47,6 @@
     log.info("Starting MON Evaluator...")
     log.debug("Config: %s", cfg.conf)
     log.info("Initializing database...")
-    db_manager = DatabaseManager(cfg)
-    db_manager.create_tables()
-    log.info("Database initialized correctly.")
     evaluator = Evaluator(cfg)
     evaluator.evaluate_forever()