Fix build due to phasing off SecurityManager usage in favor of Java Agent (#235)

* Fix build due to phasing off SecurityManager usage in favor of Java Agent

Signed-off-by: Andriy Redko <drreta@gmail.com>

* Address code review comments

Signed-off-by: Andriy Redko <drreta@gmail.com>

* Revert changes to plugin-security.policy

Signed-off-by: Andriy Redko <drreta@gmail.com>

---------

Signed-off-by: Andriy Redko <drreta@gmail.com>

Author: reta

build.gradle

@@ -91,9 +91,17 @@ opensearchplugin {
   noticeFile rootProject.file('NOTICE')
 }
 
+configurations {
+  agent
+}
+
 dependencies {
   api "com.github.luben:zstd-jni:1.5.6-1"
   api "com.intel.qat:qat-java:1.1.1"
+
+  agent "org.opensearch:opensearch-agent-bootstrap:${opensearch_version}"
+  agent "org.opensearch:opensearch-agent:${opensearch_version}"
+  agent "net.bytebuddy:byte-buddy:${versions.bytebuddy}"
 }
 
 allprojects {
@@ -232,3 +240,13 @@ task updateVersion {
         ant.replaceregexp(file:'build.gradle', match: '"opensearch.version", "\\d.*"', replace: '"opensearch.version", "' + newVersion.tokenize('-')[0] + '-SNAPSHOT"', flags:'g', byline:true)
     }
 }
+
+task prepareAgent(type: Copy) {
+  from(configurations.agent)
+  into "$buildDir/agent"
+}
+
+tasks.withType(Test) {
+  dependsOn prepareAgent
+  jvmArgs += ["-javaagent:" + project.layout.buildDirectory.file("agent/opensearch-agent-${opensearch_version}.jar").get()]
+}