SSH commands: Set task name for ReviewCommand

Task name is otherwise set to the command line which in ReviewCommands
case can be a multi line string which leads to  pretty unreadable and
bordering on unparseable "loglines" like:

[2018-01-10 09:59:17,619] [SSH gerrit review 12345,4 --message 'Build:

http://jenkins.company.com/job/JOB_NAME/job/identifier/182/ : UNSTABLE

http://jenkins.company.com/job/JOB_NAME/job/other/13677/ : SUCCESS'\
--verified -1 --code-review 0 (jenkins)] WARN <class> : <message>

Change-Id: I74a0ff062b38a1980c4781e8e79a368bf028c549

gerrit-sshd/src/main/java/com/google/gerrit/sshd/commands/ReviewCommand.java

@@ -281,6 +281,11 @@ public class ReviewCommand extends SshCommand {
     }
   }
 
+  @Override
+  protected String getTaskDescription() {
+    return "gerrit review";
+  }
+
   private void applyReview(PatchSet patchSet, final ReviewInput review) throws RestApiException {
     gApi.changes()
         .id(patchSet.getId().getParentKey().get())