SEC-1034: log4j migration to confluent repackaged version

Author: niteshmor

pom.xml

@@ -147,6 +147,12 @@
             <type>test-jar</type>
             <scope>test</scope>
         </dependency>
+        <!-- Use a repackaged version of log4j with security patches. Default log4j v1.2 is a transitive dependency of connect-runtime, but it is excluded in common/pom.xml -->
+        <dependency>
+            <groupId>io.confluent</groupId>
+            <artifactId>confluent-log4j</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.apache.kafka</groupId>
             <artifactId>connect-runtime</artifactId>