Hardening/harness test cleanup round 2

All tests using orionCurl super function now plus a couple of minor bugs.
I'm getting an error that seems to be related with content length in the /version operation:

```
fermin@debvm:~/src/fiware-orion$ test/functionalTest/testHarness.sh test/functionalTest/cases/ipv4_ipv6_both.test 
001/1: ipv4_ipv6_both.test ... (ERROR 9) 8 seconds

Orion Functional Test Log File:
================================================================================
Orion Functional tests starting
Thu Jun 26 05:54:48 CEST 2014

-----  IPv6 IPv4 Both  -----
(ipv4_ipv6_both.test) output not as expected
VALIDATION ERROR: input line:
   Content-Length: 284
does not match ref line:
   Content-Length: 283


================================================================================


----------- Failing tests ------------------
  o  ipv4_ipv6_both.test
```

Could somebody check if that also happens in his environment? (to discard local cause in my machine)