Another general issue. The filter seems not working for valgrind test suite:

```
fermin@oriondeb:~/src/fiware-orion$ make valgrind TEST_FILTER=throttling
For detailed info: tail -f /tmp/valgrindTestSuiteLog
test/valgrind/valgrindTestSuite.sh
Great, all valgrind tests ran without any memory leakage
```

However, it the make valgrind target "linked" to the new functional test or with the old one? In the latter case, the behaviour is fully understanble (as the old approach doesn't support TEST_FILTER)