opnfvresultdb: Report failed TCs into result DB

opnfvresultdb: Report failed TCs into result DB

In following cases, TC will be reported as FAIL in result DB:

* CSV file with VSPERF results is missing (e.g. execution
  of vSwitch, VNF or trafficgen has failed)
* 0 RX FPS is detected for at least one packet size during
  RFC2544 Throughput test (e.g. vSwitch is not properly
  configured due insufficient hugepages size)

JIRA: VSPERF-488

Change-Id: I453bbe32db87497644e1464e74ef597f0f0f323c
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Mars Toktonaliev <mars.toktonaliev@nokia.com>
Reviewed-by: Morgan Richomme <morgan.richomme@orange.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>
Reviewed-by: Trevor Cooper <trevor.cooper@intel.com>