Minor change to the service token sample test config

Make the sample test config project for tester5 be test5
to match the configured account in proxy-server.conf-sample.
That way the sample test config will work if uncommented.

Change-Id: I57144fe153775de51c950cfc101fcdf34dfac5e8

test/sample.conf

@@ -39,7 +39,7 @@ password3 = testing3
 # the primary test account. The user must have a group/role that is unique
 # and not given to the primary tester and is specified in the options
 # <prefix>_require_group (tempauth) or <prefix>_service_roles (keystoneauth).
-#account5 = service
+#account5 = test5
 #username5 = tester5
 #password5 = testing5