Fix message i18n error

Partial-Bug: #1217100

Using tools/check_i18n.py to scan source directory, and fix most of
the errors.

- Message internationalization
- First letter must be capital
- Using comma instead of percent in LOG.xxx

Note: all extension's description are not touched in this patch,
can be fixed after discussing.
Note: all nicira/check_nvp_config.py print messages are not fixed.

Change-Id: I79ef06fd42f6780beb5019c592662536c2a51864

neutron/services/vpn/device_drivers/ipsec.py

@@ -58,13 +58,13 @@ openswan_opts = [
         default=os.path.join(
             TEMPLATE_PATH,
             'template/openswan/ipsec.conf.template'),
-        help='Template file for ipsec configuration'),
+        help=_('Template file for ipsec configuration')),
     cfg.StrOpt(
         'ipsec_secret_template',
         default=os.path.join(
             TEMPLATE_PATH,
             'template/openswan/ipsec.secret.template'),
-        help='Template file for ipsec secret configuration')
+        help=_('Template file for ipsec secret configuration'))
 ]
 
 cfg.CONF.register_opts(openswan_opts, 'openswan')

tools/i18n_cfg.py

@@ -94,4 +94,4 @@ msg_format_checkers = [
 
 file_black_list = ["./neutron/tests/unit",
                    "./neutron/openstack",
-                   "./quantum/plugins/bigswitch/tests"]
+                   "./neutron/plugins/bigswitch/tests"]