Use min attribute from oslo_config

"min=0" is now introduced in oslo_config, so no
need to check for negative integer in code for
"glance_num_retries".

TrivialFix

Change-Id: Ib62ad460f8ec8de1cada6ff70d026f72487691af

cinder/common/config.py

@@ -61,6 +61,7 @@ global_opts = [
                default=1,
                help='Version of the glance API to use'),
     cfg.IntOpt('glance_num_retries',
+               min=0,
                default=0,
                help='Number retries when downloading an image from glance'),
     cfg.BoolOpt('glance_api_insecure',

cinder/image/glance.py

@@ -36,7 +36,7 @@ from six.moves import range
 from six.moves import urllib
 
 from cinder import exception
-from cinder.i18n import _, _LE, _LW
+from cinder.i18n import _, _LE
 
 
 glance_opts = [
@@ -157,13 +157,6 @@ class GlanceClientWrapper(object):
         self.api_servers = None
         self.version = version
 
-        if CONF.glance_num_retries < 0:
-            LOG.warning(_LW(
-                "glance_num_retries shouldn't be a negative value. "
-                "The number of retries will be set to 0 until this is"
-                "corrected in the cinder.conf."))
-            CONF.set_override('glance_num_retries', 0)
-
     def _create_static_client(self, context, netloc, use_ssl, version):
         """Create a client that we'll use for every call."""
         self.netloc = netloc