tools/python: Improve unit test handling

* Add X86_{CPUID,MSR}_POLICY_FORMAT checks which were missed previously.
 * Drop test_suite().  It hasn't been necessary since the Py2.3 era.
 * Drop the __main__ logic.  This can't be used without manually adjusting the
   include path, and `make test` knows how to do the right thing.
 * For `make test`, use `-v` to see which tests have been discovered and run.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

tools/python/Makefile

@@ -36,7 +36,7 @@ uninstall:
 
 .PHONY: test
 test:
-	LD_LIBRARY_PATH=$$(readlink -f ../libs/ctrl):$$(readlink -f ../xenstore) $(PYTHON) -m unittest discover
+	LD_LIBRARY_PATH=$$(readlink -f ../libs/ctrl):$$(readlink -f ../xenstore) $(PYTHON) -m unittest discover -v
 
 .PHONY: clean
 clean: