Implemented exception config module

Implemented exception config module

Partially Implements: blueprint centralise-config-opts

Change-Id: Ic1b94e28a960a7306f15afbf69382edc15b5999e

watcher/common/exception.py

@@ -26,22 +26,16 @@ import functools
 import sys
 
 from keystoneclient import exceptions as keystone_exceptions
-from oslo_config import cfg
 from oslo_log import log as logging
 import six
 
 from watcher._i18n import _, _LE
 
+from watcher import conf
+
 LOG = logging.getLogger(__name__)
 
-EXC_LOG_OPTS = [
-    cfg.BoolOpt('fatal_exception_format_errors',
-                default=False,
-                help='Make exception message format errors fatal.'),
-]
-
-CONF = cfg.CONF
-CONF.register_opts(EXC_LOG_OPTS)
+CONF = conf.CONF
 
 
 def wrap_keystone_exception(func):