pytest: Skip test_fee_limits for DEVELOPER=0

Signed-off-by: Christian Decker <decker.christian@gmail.com>

tests/test_lightningd.py

@@ -2709,6 +2709,7 @@ class LightningDTests(BaseLightningDTests):
         l1.daemon.wait_for_log('onchaind complete, forgetting peer')
         l2.daemon.wait_for_log('onchaind complete, forgetting peer')
 
+    @unittest.skipIf(not DEVELOPER, "needs DEVELOPER=1")
     def test_fee_limits(self):
         # FIXME: Test case where opening denied.
         l1, l2 = self.connect()