Added build script for jetty-test-helper package (ppc64le#1384)

* Added build script for jetty-test-helper package

* Updated as per review comments

j/jetty/jetty-test-helper_5.3_ubi_8.4.sh

@@ -0,0 +1,61 @@
+# ----------------------------------------------------------------------------
+#
+# Package               : jetty-test-helper
+# Version               : jetty-test-helper-5.3
+# Source repo           : https://github.com/eclipse/jetty.toolchain
+# Tested on             : UBI 8.4
+# Language              : Java
+# Travis-Check          : True
+# Script License        : Apache License, Version 2 or later
+# Maintainer            : Vikas <[email protected]>
+#
+# Disclaimer            : This script has been tested in root mode on given
+# ==========              platform using the mentioned version of the package.
+#                         It may not work as expected with newer versions of the
+#                         package and/or distribution. In such case, please
+#                         contact "Maintainer" of this script.
+#
+# ----------------------------------------------------------------------------
+#!/bin/bash
+
+set -e
+
+if [ -z "$1" ]; then
+  export PACKAGE_VERSION=jetty-test-helper-5.3
+else
+  export PACKAGE_VERSION=$1
+fi
+if [ -d "jetty.toolchain" ] ; then
+  rm -rf jetty.toolchain
+fi
+
+# Dependency installation
+dnf install -y git java-1.8.0-openjdk-devel maven
+
+# Download the repos
+git clone https://github.com/eclipse/jetty.toolchain.git
+
+# Checkout version
+cd jetty.toolchain
+git checkout $PACKAGE_VERSION
+ret=$?
+if [ $ret -eq 0 ] ; then
+ echo "$PACKAGE_VERSION found to checkout "
+else
+ echo "$PACKAGE_VERSION not found "
+ exit
+fi
+
+mvn install -DskipTests=true
+ret=$?
+if [ $ret -ne 0 ] ; then
+  echo "Build failed "
+else
+  mvn test
+  ret=$?
+  if [ $ret -ne 0 ] ; then
+    echo "Tests failed "
+  else
+    echo "Build & unit tests Successful "
+  fi
+fi