QA: switch RAPI to https

Since we by default now use SSL for RAPI, we need to switch the QA
tests to SSL too.

Reviewed-by: amishchenko

qa/qa_rapi.py

@@ -81,7 +81,7 @@ def _DoTests(uris):
   for uri, verify in uris:
     assert uri.startswith("/")
 
-    url = "http://%s:%s%s" % (host, port, uri)
+    url = "https://%s:%s%s" % (host, port, uri)
 
     print "Testing %s ..." % url