Tests: Put Extended tests first when they're included

* Added documentation in tests/README.md about enabling wallet, utils and daemon.
* Change ordering to make the long-running EXTENDED_TESTS go first.

test/README.md

@@ -25,6 +25,8 @@ The ZMQ functional test requires a python ZMQ library. To install it:
 Running tests locally
 =====================
 
+Build for your system first. Be sure to enable wallet, utils and daemon when you configure. Tests will not run otherwise.
+
 Functional tests
 ----------------