[test] Add test for NODE_COMPACT_FILTER.

Test that a node configured to serve compact filters will signal
NODE_COMPACT_FILTER service bit.

test/functional/test_framework/messages.py

@@ -49,6 +49,7 @@ NODE_NETWORK = (1 << 0)
 NODE_GETUTXO = (1 << 1)
 NODE_BLOOM = (1 << 2)
 NODE_WITNESS = (1 << 3)
+NODE_COMPACT_FILTERS = (1 << 6)
 NODE_NETWORK_LIMITED = (1 << 10)
 
 MSG_TX = 1