Using java-agent gradle plugin to phase off Security Manager in favor of Java-agent.

Author: pranu2502

build.gradle

@@ -97,6 +97,7 @@ allprojects {
 
 apply plugin: 'opensearch.opensearchplugin'
 apply plugin: 'opensearch.pluginzip'
+apply plugin: 'opensearch.java-agent'
 
 licenseFile = rootProject.file('LICENSE.txt')
 noticeFile = rootProject.file('NOTICE.txt')