ISSUE-133 Add a runner example

Author: quantranhong1999

src/it/scala-2.12/com/linagora/gatling/imap/scenario/it/GatlingRunnerSample.scala

@@ -0,0 +1,15 @@
+package com.linagora.gatling.imap.scenario.it
+
+import io.gatling.app.Gatling
+import io.gatling.core.config.GatlingPropertiesBuilder
+
+object GatlingRunnerSample extends App {
+  val simulationClass: String = "com.linagora.gatling.imap.scenario.it.ImapCompressScenarioJamesIT"
+  val props: GatlingPropertiesBuilder = new GatlingPropertiesBuilder
+  props.resourcesDirectory("src/main/scala-2.12")
+  props.binariesDirectory("target/scala-2.12/classes")
+  props.resultsDirectory("/tmp/gatling-result")
+  props.simulationClass(simulationClass)
+
+  Gatling.fromMap(props.build)
+}