Configurable SSL certificate validation

Adding boolean config opt "disable_ssl_certificate_validation".
When set to true, and running Python 2.7.9+ or Python 3.2+,
the dashboard basic ops scenario will ignore self-signed or otherwise
invalid SSL certificates.

Change-Id: I98f585ad0fbe4fb0ee913329a9269744fe4437bd
diff --git a/tempest_horizon/config.py b/tempest_horizon/config.py
index a66ab86..1e29aed 100644
--- a/tempest_horizon/config.py
+++ b/tempest_horizon/config.py
@@ -23,9 +23,12 @@
                default='http://localhost/auth/login/',
                help="Login page for the dashboard",
                deprecated_for_removal=True),
+    cfg.BoolOpt('disable_ssl_certificate_validation',
+                default=False,
+                help="Set to True if using self-signed SSL certificates."),
 ]
 
-#service_opt = cfg.BoolOpt(
+# service_opt = cfg.BoolOpt(
 #    'horizon', default=True,
 #    help="Whether or not Horizon is expected to be available")
 #