maint: remove redundant default=None for config options

These 73 instances were inconsistent and redundant.

Change-Id: I298f2406535d0805caebdca4f2729d720dd5222f

nova/baserpc.py

@@ -27,7 +27,6 @@ import nova.openstack.common.rpc.proxy as rpc_proxy
 
 CONF = cfg.CONF
 rpcapi_cap_opt = cfg.StrOpt('baseapi',
-        default=None,
         help='Set a version cap for messages sent to the base api in any '
              'service')
 CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')

nova/notifications.py

@@ -39,7 +39,7 @@ from nova import utils
 LOG = log.getLogger(__name__)
 
 notify_opts = [
-    cfg.StrOpt('notify_on_state_change', default=None,
+    cfg.StrOpt('notify_on_state_change',
         help='If set, send compute.instance.update notifications on instance '
              'state changes.  Valid values are None for no notifications, '
              '"vm_state" for notifications on VM state changes, or '

nova/scheduler/filters/trusted_filter.py

@@ -62,10 +62,8 @@ LOG = logging.getLogger(__name__)
 
 trusted_opts = [
     cfg.StrOpt('attestation_server',
-               default=None,
                help='attestation server http'),
     cfg.StrOpt('attestation_server_ca_file',
-               default=None,
                help='attestation server Cert file for Identity verification'),
     cfg.StrOpt('attestation_port',
                default='8443',
@@ -74,7 +72,6 @@ trusted_opts = [
                default='/OpenAttestationWebServices/V1.0',
                help='attestation web API URL'),
     cfg.StrOpt('attestation_auth_blob',
-               default=None,
                help='attestation authorization blob - must change'),
     cfg.IntOpt('attestation_auth_timeout',
                default=60,

nova/scheduler/rpcapi.py

@@ -33,7 +33,6 @@ CONF = cfg.CONF
 CONF.register_opts(rpcapi_opts)
 
 rpcapi_cap_opt = cfg.StrOpt('scheduler',
-        default=None,
         help='Set a version cap for messages sent to scheduler services')
 CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
 

nova/service.py

@@ -65,7 +65,6 @@ service_opts = [
                default=8773,
                help='port for ec2 api to listen'),
     cfg.IntOpt('ec2_workers',
-               default=None,
                help='Number of workers for EC2 API service'),
     cfg.StrOpt('osapi_compute_listen',
                default="0.0.0.0",
@@ -74,7 +73,6 @@ service_opts = [
                default=8774,
                help='list port for osapi compute'),
     cfg.IntOpt('osapi_compute_workers',
-               default=None,
                help='Number of workers for OpenStack API service'),
     cfg.StrOpt('metadata_manager',
                default='nova.api.manager.MetadataManager',
@@ -86,7 +84,6 @@ service_opts = [
                default=8775,
                help='port for metadata api to listen'),
     cfg.IntOpt('metadata_workers',
-               default=None,
                help='Number of workers for metadata service'),
     cfg.StrOpt('compute_manager',
                default='nova.compute.manager.ComputeManager',

nova/utils.py

@@ -77,7 +77,6 @@ utils_opts = [
                help='Path to the rootwrap configuration file to use for '
                     'running commands as root'),
     cfg.StrOpt('tempdir',
-               default=None,
                help='Explicitly specify the temporary working directory'),
 ]
 CONF = cfg.CONF

nova/wsgi.py

@@ -55,14 +55,11 @@ wsgi_opts = [
                  'into it: client_ip, date_time, request_line, status_code, '
                  'body_length, wall_seconds.'),
     cfg.StrOpt('ssl_ca_file',
-               default=None,
                help="CA certificate file to use to verify "
                     "connecting clients"),
     cfg.StrOpt('ssl_cert_file',
-                    default=None,
                     help="SSL certificate of API server"),
     cfg.StrOpt('ssl_key_file',
-                    default=None,
                     help="SSL private key of API server"),
     cfg.IntOpt('tcp_keepidle',
                default=600,