[SnabbBot] Fail tasks when build fails, include test output
even for successul test runs in tasks/test.sh .
Merge pull request #266 from eugeneia/snabb_bot_fixes

[SnabbBot] Make tasks fail when build fails
nfv.config: Make traffic rate policing mode optional

The default is off.
PCI: don't try to touch dirs or files that doesn't exist
Intel10g: fully implement shared resource negotiation (section 10.5.4)
add verification to intel_app.selftest()
Merge pull request #240 from javierguerragiraldez/negotiate_link

Intel10G: better NIC initialization