Take static module capabilities into use

The static module capabilities are now used to query the capabilities of
filters and routers. The new RCAP_TYPE_NOAUTH capability is also taken
into use. These changes removes the need for the `is_internal_service`
function.

server/modules/routing/cli/cli.c

@@ -91,7 +91,7 @@ MXS_MODULE* MXS_CREATE_MODULE()
         MXS_ROUTER_VERSION,
         "The admin user interface",
         "V1.0.0",
-        MXS_NO_MODULE_CAPABILITIES,
+        RCAP_TYPE_NO_AUTH,
         &MyObject,
         NULL, /* Process init. */
         NULL, /* Process finish. */
@@ -290,5 +290,5 @@ diagnostics(MXS_ROUTER *instance, DCB *dcb)
 
 static uint64_t getCapabilities(MXS_ROUTER *instance)
 {
-    return 0;
+    return RCAP_TYPE_NONE;
 }