Partial fix for ISSUE #170

```
  <serviceProxy name="A" port="80">...</serviceProxy>
  <serviceProxy name="B" port="80" ip="localhost">...</serviceProxy>
  <serviceProxy name="C" port="80" ip="127.0.0.1">...</serviceProxy>
```

* A vs B => no solution, only runtime exception with correct error message
* B vs C => fixed

Also added :
* check if service proxy use the same SSL configuration on the same "ip:port"
* test dependencies on Mockito and PowerMock
* junit test for HttpTransport