fix(micro-java): add newline char to output str

Dan K

2019-07-19 f9e42817fafbb28b602b0a5873dbd90459a8a81f

 micro-java/src/main/java/com/redhat/training/openshift/hello/HelloResource.java

@@ -19,7 +19,7 @@
         if (message == null) {
           response = "Hello world from host "+hostname+"\n";
         } else {
           response = "Hello world from host ["+hostname+"].";
           response = "Hello world from host ["+hostname+"].\n";
           response += "Message received = "+message+"\n";
        }
        return response;