Separated the events to two different Java classes

Moved the tests to the test module

Author: msailes

aws-lambda-java-tests/src/test/java/com/amazonaws/services/lambda/runtime/tests/EventLoaderTest.java

@@ -26,6 +26,7 @@
 import com.amazonaws.services.lambda.runtime.events.KinesisFirehoseEvent;
 import com.amazonaws.services.lambda.runtime.events.LambdaDestinationEvent;
 import com.amazonaws.services.lambda.runtime.events.LexEvent;
+import com.amazonaws.services.lambda.runtime.events.MSKFirehoseEvent;
 import com.amazonaws.services.lambda.runtime.events.RabbitMQEvent;
 import com.amazonaws.services.lambda.runtime.events.S3Event;
 import com.amazonaws.services.lambda.runtime.events.SNSEvent;