[ISSUE #3685] Fix param spelling error (#3678)

* Update .travis.yml

Depracated MODERATE noisy mail for dev@rocketmq.apache.org. Still Failing: apache/rocketmq#5670 (5.0.0-alpha-static-topic - 5ebc327) @dongeforever

* fix class[RemotingHelper]  method[exceptionSimpleDesc] var[element] spelling error

.travis.yml

@@ -4,8 +4,10 @@ notifications:
   email:
     recipients:
       - dev@rocketmq.apache.org
+    if: branch = develop OR branch = master
   on_success: change
   on_failure: always
+  
 
 language: java
 

remoting/src/main/java/org/apache/rocketmq/remoting/common/RemotingHelper.java

@@ -47,9 +47,9 @@ public class RemotingHelper {
 
             StackTraceElement[] stackTrace = e.getStackTrace();
             if (stackTrace != null && stackTrace.length > 0) {
-                StackTraceElement elment = stackTrace[0];
+                StackTraceElement element = stackTrace[0];
                 sb.append(", ");
-                sb.append(elment.toString());
+                sb.append(element.toString());
             }
         }