Add SSL support to Consul inventory script

Change passes in the scheme argument to python-consul's Consul
initializer. Default scheme is set to http.

contrib/inventory/consul_io.py

@@ -465,6 +465,7 @@ class ConsulConfig(dict):
       host = 'localhost'
       port =  8500
       token = None
+      scheme = 'http'
 
       if hasattr(self, 'url'):
           from urlparse import urlparse
@@ -473,11 +474,13 @@ class ConsulConfig(dict):
               host = o.hostname
           if o.port:
               port = o.port
+          if o.scheme:
+              scheme = o.scheme
 
       if hasattr(self, 'token'):
           token = self.token
           if not token:
               token = 'anonymous'
-      return consul.Consul(host=host, port=port, token=token)
+      return consul.Consul(host=host, port=port, token=token, scheme=scheme)
 
 ConsulInventory()