Don't warn on configured insecure certs

If we have to connect to bogus certs and we know this and we've
configured 'verfiy=False' meaning that we've explicitly indicated
that we want to turn off cert verification, then spamming our logs
with warnings that the certs are invalid is a bit lame. We know. We're
not happy about it - but at least one of our providers has bad certs. We
wish we had the power to change it, but we don't. We already feel bad.
STOP YELLING AT US.

Change-Id: I08d816bcc1685fc9ed3bfcf2e3e8300859059903

shade/openstackcloud.py

@@ -18,6 +18,7 @@ import os_client_config
 import os_client_config.defaults
 import threading
 import time
+import warnings
 
 from dogpile import cache
 
@@ -48,6 +49,14 @@ from shade import task_manager
 from shade import _tasks
 from shade import _utils
 
+# Importing these for later but not disabling for now
+try:
+    from requests.packages.urllib3.exceptions import InsecureRequestWarning
+except ImportError:
+    try:
+        from urllib3.exceptions import InsecureRequestWarning
+    except ImportError:
+        InsecureRequestWarning = None
 
 OBJECT_MD5_KEY = 'x-object-meta-x-shade-md5'
 OBJECT_SHA256_KEY = 'x-object-meta-x-shade-sha256'
@@ -157,6 +166,13 @@ class OpenStackCloud(object):
                 name=self.name, client=self)
 
         (self.verify, self.cert) = cloud_config.get_requests_verify_args()
+        # Turn off urllib3 warnings about insecure certs if we have
+        # explicitly configured requests to tell it we do not want
+        # cert verification
+        if not self.verify:
+            self.log.debug(
+                "Turning off Insecure SSL warnings since verify=False")
+            warnings.filterwarnings('ignore', category=InsecureRequestWarning)
 
         self._servers = []
         self._servers_time = 0