Fixing initialize test extension as jackson version mismatch with cor…

…e. (#982)

Signed-off-by: Sarat Vemulapalli <vemsarat@amazon.com>

build.gradle

@@ -165,7 +165,7 @@ dependencies {
     def opensearchVersion = "${opensearch_version}"
     def log4jVersion = "2.21.1"
     def nettyVersion = "4.1.101.Final"
-    def jacksonDatabindVersion = "2.15.3"
+    def jacksonDatabindVersion = "2.16.1"
     def guavaVersion = "32.1.3-jre"
     def guiceVersion = "7.0.0"
     def junit4Version = "4.13.2"