feat: use metricbeat to grab host metrics (#1718)

Author: kuisathaverat

.ci/load/Jenkinsfile

@@ -197,8 +197,8 @@ pipeline {
 
  // force kill any remaining app instance to ensure app can start
  sh(script: ".ci/load/scripts/app.sh stopApp")
-
- script {
+ metricbeat(es_secret: 'secret/apm-team/ci/load-test-cloud-elastic'){
+  script {
  echo "start application with JVM options '${params.jvm_options}'"
 
  def java_home = sh(script: ".ci/load/scripts/fetch_sdk.sh ${params.jvm_version}", returnStdout: true).trim()
@@ -276,7 +276,7 @@ pipeline {
  withSecretVault(secret: 'secret/apm-team/ci/bandstand', user_var_name: 'APP_TOKEN_TYPE', pass_var_name: 'APP_TOKEN') {
  sh(script: ".ci/load/scripts/app.sh")
  }
-
+ }
  }
  }
  post {