Partial-Bug: 1464016 Add hook via env to bgp_stress_test to set number of events
Partial-Bug: 1464016 Add hook via env to bgp_stress_test to set number of events

bgp_stress_test_suite runs tests with either default number of events (50) or
higher. Have a way to change this from outside via env BGP_STRESS_TEST_NEVENTS.
If set to -1, only initial test setup is executed and no other events are
injected.

Change-Id: I84827aa3aba29b0da37647e469b33cb573e9ed0f

hthompson6/contrail-controller,vmahuli/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,sajuptpm/contrail-controller,hthompson6/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,sajuptpm/contrail-controller,DreamLab/contrail-controller,vpramo/contrail-controller,eonpatapon/contrail-controller,vmahuli/contrail-controller,vmahuli/contrail-controller,nischalsheth/contrail-controller,facetothefate/contrail-controller,numansiddique/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,numansiddique/contrail-controller,tcpcloud/contrail-controller,nischalsheth/contrail-controller,numansiddique/contrail-controller,vpramo/contrail-controller,DreamLab/contrail-controller,vpramo/contrail-controller,sajuptpm/contrail-controller,rombie/contrail-controller,tcpcloud/contrail-controller,reiaaoyama/contrail-controller,tcpcloud/contrail-controller,facetothefate/contrail-controller,reiaaoyama/contrail-controller,sajuptpm/contrail-controller,codilime/contrail-controller,hthompson6/contrail-controller,vpramo/contrail-controller,nischalsheth/contrail-controller,sajuptpm/contrail-controller,codilime/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,sajuptpm/contrail-controller,DreamLab/contrail-controller,nischalsheth/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,reiaaoyama/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,numansiddique/contrail-controller,reiaaoyama/contrail-controller,reiaaoyama/contrail-controller,DreamLab/contrail-controller,eonpatapon/contrail-controller,facetothefate/contrail-controller,vmahuli/contrail-controller,facetothefate/contrail-controller,DreamLab/contrail-controller,hthompson6/contrail-controller,facetothefate/contrail-controller,numansiddique/contrail-controller,codilime/contrail-controller,vpramo/contrail-controller,vmahuli/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,hthompson6/contrail-controller,codilime/contrail-controller,tcpcloud/contrail-controller