HDDS-1645. Change the version of Pico CLI to the latest 3.x release - 3.9.6

Closes #909

hadoop-hdds/pom.xml

@@ -239,7 +239,7 @@ https://maven.apache.org/xsd/maven-4.0.0.xsd">
     <dependency>
       <groupId>info.picocli</groupId>
       <artifactId>picocli</artifactId>
-      <version>3.5.2</version>
+      <version>3.9.6</version>
     </dependency>
     <dependency>
       <groupId>com.google.protobuf</groupId>

hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/ozShell/TestOzoneShell.java

@@ -631,7 +631,8 @@ public void testListVolume() throws Exception {
     err.reset();
     args = new String[] {"volume", "list", url + "/", "--user",
         user2, "--length", "invalid-length"};
-    executeWithError(shell, args, "For input string: \"invalid-length\"");
+    executeWithError(shell, args, "Invalid value for option " +
+        "'--length': 'invalid-length' is not an int");
   }
 
   @Test