fix(e2e testHelper): handle missing argument
fix(e2e testHelper): handle missing argument

xlinur/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,nagyistoce/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,jangalinski/camunda-bpm-webapp