added disable_poison test parameter

Author: smuzaffar

cms-bot-cmssw-cmds.md

@@ -39,6 +39,7 @@ test parameters:
 [  - ]enable_test(s|) = none,gpu,threading,profiling
 [  - ]ignore_test(s|) = build-warnings|build-warnings|none
 [  - ]full(_cmssw|) = true|false
+[  - ]disable_poison = true|false
 [  - ]container = cmssw/cc7:amd64-dYYYYMMDD
 [  - ](cms-|)addpkg = <cmssw_package>[,<cmssw_package>[,...]]
 [  - ]relvals_opt(ion|)(s|)(_input|_threading|_gpu|) = <runTheMatrix-extra-options for normal relval or special input/threading/gpu jobs>