Update EventLoader.java

Added new test.

Author: ShashankAWS

aws-lambda-java-tests/src/main/java/com/amazonaws/services/lambda/runtime/tests/EventLoader.java

@@ -89,6 +89,10 @@ public static LexEvent loadLexEvent(String filename) {
         return loadEvent(filename, LexEvent.class);
     }
 
+    public static MSKFirehoseEvent loadMSKFirehoseEvent(String filename) {
+        return loadEvent(filename, MSKFirehoseEvent.class);
+    }
+
     public static S3Event loadS3Event(String filename) {
         return loadEvent(filename, S3Event.class);
     }