Add integTest script to the repo (opensearch-project#94)

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

integtest.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+set -e
+
+function usage() {
+    echo ""
+    echo "This script is used to run integration tests for plugin installed on a remote OpenSearch/Dashboards cluster."
+    echo "--------------------------------------------------------------------------"
+    echo "Usage: $0 [args]"
+    echo ""
+    echo "Required arguments:"
+    echo "None"
+    echo ""
+    echo "Optional arguments:"
+    echo -e "-b BIND_ADDRESS\t, defaults to localhost | 127.0.0.1, can be changed to any IP or domain name for the cluster location."
+    echo -e "-p BIND_PORT\t, defaults to 9200 or 5601 depends on OpenSearch or Dashboards, can be changed to any port for the cluster location."
+    echo -e "-s SECURITY_ENABLED\t(true | false), defaults to true. Specify the OpenSearch/Dashboards have security enabled or not."
+    echo -e "-c CREDENTIAL\t(usename:password), no defaults, effective when SECURITY_ENABLED=true."
+    echo -e "-h\tPrint this message."
+    echo "--------------------------------------------------------------------------"
+}
+
+while getopts ":hb:p:s:c:" arg; do
+    case $arg in
+        h)
+            usage
+            exit 1
+            ;;
+        b)
+            BIND_ADDRESS=$OPTARG
+            ;;
+        p)
+            BIND_PORT=$OPTARG
+            ;;
+        s)
+            SECURITY_ENABLED=$OPTARG
+            ;;
+        c)
+            CREDENTIAL=$OPTARG
+            ;;
+        :)
+            echo "-${OPTARG} requires an argument"
+            usage
+            exit 1
+            ;;
+        ?)
+            echo "Invalid option: -${OPTARG}"
+            exit 1
+            ;;
+    esac
+done
+
+
+if [ -z "$BIND_ADDRESS" ]
+then
+  BIND_ADDRESS="localhost"
+fi
+
+if [ -z "$BIND_PORT" ]
+then
+  BIND_PORT="9200"
+fi
+
+if [ -z "$SECURITY_ENABLED" ]
+then
+  SECURITY_ENABLED="true"
+fi
+
+if [ -z "$CREDENTIAL" ]
+then
+  CREDENTIAL="admin:admin"
+  USERNAME=`echo $CREDENTIAL | awk -F ':' '{print $1}'`
+  PASSWORD=`echo $CREDENTIAL | awk -F ':' '{print $2}'`
+fi
+
+./gradlew integTest -Dtests.rest.cluster="$BIND_ADDRESS:$BIND_PORT" -Dtests.cluster="$BIND_ADDRESS:$BIND_PORT" -Dtests.clustername="opensearch-integrationtest" -Dhttps=$SECURITY_ENABLED -Duser=$USERNAME -Dpassword=$PASSWORD --console=plain
+