Add confluent maven reposetory to kstreams-commons

theodolite-benchmarks/kstreams-commons/build.gradle

@@ -7,6 +7,9 @@ repositories {
   maven {
     url "https://oss.sonatype.org/content/repositories/snapshots/"
   }
+  maven {
+    url 'https://packages.confluent.io/maven/'
+  }
 }
 
 dependencies {