make: always allow running python tests manually

Keep the rules to run the external-tests in tests/Makefile available for
invocation, to allow conveniently launching the tests manualy without the need
to pass --with-external-tests to ./configure first.

Change-Id: Ic28dbeabddee6b41af12b977e3fe59e663ee51a1
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 7e45da4..e07749c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -44,6 +44,10 @@
 # don't run vty and ctrl tests concurrently so that the ports don't conflict
 	$(MAKE) vty-test
 	$(MAKE) ctrl-test
+else
+python-tests:
+	echo "Not running python-based external tests (determined at configure-time)"
+endif
 
 VTY_TEST_DB = hlr_vty_test.db
 
@@ -75,11 +79,6 @@
 	-rm -f $(CTRL_TEST_DB)
 	-rm $(CTRL_TEST_DB)-*
 
-else
-python-tests:
-	echo "Not running python-based tests (determined at configure-time)"
-endif
-
 check-local: atconfig $(TESTSUITE)
 	$(SHELL) '$(TESTSUITE)' $(TESTSUITEFLAGS)
 	$(MAKE) $(AM_MAKEFLAGS) python-tests