chore(qa/performance): fail ant task when generate-load returns with an exit code != 0
chore(qa/performance): fail ant task when generate-load returns with an
exit code != 0

related to #CAM-6972

subhrajyotim/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,subhrajyotim/camunda-bpm-platform,langfr/camunda-bpm-platform,jangalinski/camunda-bpm-platform,camunda/camunda-bpm-platform,subhrajyotim/camunda-bpm-platform,langfr/camunda-bpm-platform,filiphr/camunda-bpm-platform,subhrajyotim/camunda-bpm-platform,jangalinski/camunda-bpm-platform,xasx/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,filiphr/camunda-bpm-platform,langfr/camunda-bpm-platform,subhrajyotim/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,camunda/camunda-bpm-platform,bentrm/camunda-bpm-platform,camunda/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,bentrm/camunda-bpm-platform,bentrm/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,jangalinski/camunda-bpm-platform,filiphr/camunda-bpm-platform,falko/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,filiphr/camunda-bpm-platform,falko/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,bentrm/camunda-bpm-platform,ingorichtsmeier/camunda-bpm-platform,camunda/camunda-bpm-platform,jangalinski/camunda-bpm-platform,falko/camunda-bpm-platform,xasx/camunda-bpm-platform,bentrm/camunda-bpm-platform,camunda/camunda-bpm-platform,falko/camunda-bpm-platform,falko/camunda-bpm-platform,langfr/camunda-bpm-platform,xasx/camunda-bpm-platform,jangalinski/camunda-bpm-platform,filiphr/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,xasx/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,xasx/camunda-bpm-platform,filiphr/camunda-bpm-platform,camunda/camunda-bpm-platform,AlexMinsk/camunda-bpm-platform,falko/camunda-bpm-platform,langfr/camunda-bpm-platform,jangalinski/camunda-bpm-platform,xasx/camunda-bpm-platform,langfr/camunda-bpm-platform,bentrm/camunda-bpm-platform,subhrajyotim/camunda-bpm-platform