Prepare for dropping keystone admin endpoint

Keystone no longer has any special functionality hidden behind the admin
endpoint. Stop referencing it in consumers, so it can later be dropped
completely.

Change-Id: I04a5d77908005268cc7c59e7e9ddeea70f6732e2
diff --git a/lib/swift b/lib/swift
index 3c121ca..a981dfc 100644
--- a/lib/swift
+++ b/lib/swift
@@ -527,7 +527,7 @@
         else
             iniset ${testfile} func_test auth_port 80
         fi
-        iniset ${testfile} func_test auth_uri ${KEYSTONE_AUTH_URI}
+        iniset ${testfile} func_test auth_uri ${KEYSTONE_SERVICE_URI}
         if [[ "$auth_vers" == "3" ]]; then
             iniset ${testfile} func_test auth_prefix /identity/v3/
         else