[improve][test] Increase java memory in mvn tests

Author: nikhil-ctds

pom.xml

@@ -1669,7 +1669,7 @@ flexible messaging model and an intuitive client API.</description>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <argLine>${testJacocoAgentArgument} -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${testHeapDumpPath} -XX:+ExitOnOutOfMemoryError -Xmx2G -XX:+UseZGC
+          <argLine>${testJacocoAgentArgument} -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${testHeapDumpPath} -XX:+ExitOnOutOfMemoryError -Xmx3G -XX:+UseZGC
             -Dpulsar.allocator.pooled=true
             -Dpulsar.allocator.leak_detection=Advanced
             -Dpulsar.allocator.exit_on_oom=false