sms: Fix the non-SMPP mode of the test

List needs to be executed from within the right configuration
node to see if it is available or not. list on the toplevel
will uncoditionally show "smpp" as part of the logging config.

openbsc/tests/vty_test_runner.py

@@ -155,12 +155,13 @@ class TestVTYNITB(TestVTYGenericBSC):
         return "smpp" in res
 
     def testSmppFirst(self):
-        if not self.checkForSmpp():
-            return
-
         # enable the configuration
         self.vty.enable()
         self.vty.command("configure terminal")
+
+        if not self.checkForSmpp():
+            return
+
         self.vty.command("smpp")
 
         # check the default