remove default=None for config options

In the cfg module default=None is set as the default value. It's not
necessary to set it again when defining config options.

Change-Id: Ib7f8e0ffa5ef082e3588686b02500cf975736293
Closes-Bug: #1323975

barbican/crypto/dogtag_crypto.py

@@ -34,10 +34,8 @@ dogtag_crypto_plugin_group = cfg.OptGroup(name='dogtag_crypto_plugin',
                                           title="Dogtag Crypto Plugin Options")
 dogtag_crypto_plugin_opts = [
     cfg.StrOpt('pem_path',
-               default=None,
                help=u._('Path to PEM file for authentication')),
     cfg.StrOpt('pem_password',
-               default=None,
                help=u._('Password to unlock PEM file')),
     cfg.StrOpt('drm_host',
                default="localhost",
@@ -46,10 +44,8 @@ dogtag_crypto_plugin_opts = [
                default="8443",
                help=u._('Port for the DRM')),
     cfg.StrOpt('nss_db_path',
-               default=None,
                help=u._('Path to the NSS certificate database')),
     cfg.StrOpt('nss_password',
-               default=None,
                help=u._('Password for NSS certificate database'))
 ]
 

barbican/crypto/p11_crypto.py

@@ -33,10 +33,8 @@ p11_crypto_plugin_group = cfg.OptGroup(name='p11_crypto_plugin',
                                        title="PKCS11 Crypto Plugin Options")
 p11_crypto_plugin_opts = [
     cfg.StrOpt('library_path',
-               default=None,
                help=u._('Path to vendor PKCS11 library')),
     cfg.StrOpt('login',
-               default=None,
                help=u._('Password to login to PKCS11 session'))
 ]
 CONF.register_group(p11_crypto_plugin_group)

barbican/model/migration/commands.py

@@ -33,7 +33,7 @@ LOG = utils.getLogger(__name__)
 
 
 db_opts = [
-    cfg.StrOpt('sql_connection', default=None),
+    cfg.StrOpt('sql_connection'),
 ]
 
 CONF = cfg.CONF

barbican/model/repositories.py

@@ -54,7 +54,7 @@ db_opts = [
     cfg.IntOpt('sql_max_retries', default=60),
     cfg.IntOpt('sql_retry_interval', default=1),
     cfg.BoolOpt('db_auto_create', default=True),
-    cfg.StrOpt('sql_connection', default=None),
+    cfg.StrOpt('sql_connection'),
     cfg.IntOpt('max_limit_paging', default=100),
     cfg.IntOpt('default_limit_paging', default=10),
 ]