Change section 'DEFAULT' to 'DEFAULTS' in contrail-database-nodemgr.conf

python ConfigParser treats section 'DEFAULT' as special and
whatever is in the 'DEFAULT' section is propagated to every other
section. Due to this, the current code in nodemgr is working only
as a result of parsing the 'DISCOVERY' section and it fails once
the 'DISCOVERY' section is removed.

Change-Id: I16da136de441cdcedbd2ecfaaf6c86e8451e2206
Partial-Bug: #1660535

src/nodemgr/database_nodemgr/contrail-database-nodemgr.conf

@@ -1,4 +1,4 @@
-[DEFAULT]
+[DEFAULTS]
 hostip=127.0.0.1
 #contrail_databases=config analytics
 minimum_diskGB=4

src/nodemgr/main.py

@@ -103,8 +103,8 @@ def main(args_str=' '.join(sys.argv[1:])):
         return
     config = ConfigParser.SafeConfigParser()
     config.read([config_file])
-    if 'DEFAULT' in config.sections():
-        default.update(dict(config.items('DEFAULT')))
+    if 'DEFAULTS' in config.sections():
+        default.update(dict(config.items('DEFAULTS')))
     if 'DISCOVERY' in config.sections():
         disc_options.update(dict(config.items('DISCOVERY')))
     disc_options['discovery_server'] = disc_options.pop('server')
@@ -146,8 +146,9 @@ def main(args_str=' '.join(sys.argv[1:])):
     parser.add_argument("--introspect_ssl_enable", action="store_true",
                         help="Enable ssl for introspect connection")
     if (node_type == 'contrail-database'):
-        parser.add_argument("--minimum_diskgb",
+        parser.add_argument("--minimum_diskGB",
                             type=int,
+                            dest='minimum_diskgb',
                             help="Minimum disk space in GB's")
         parser.add_argument("--contrail_databases",
                             nargs='+',