add react-java-mysql application sample

Signed-off-by: Anca Iordache <anca.iordache@docker.com>

samples/react-java-mysql/frontend/src/app/components/layout/ApplicationContainer.jsx

@@ -0,0 +1,15 @@
+import * as React from "react";
+
+export default class ApplicationContainer extends React.Component {
+
+    render() {
+        return (
+            <div className="main-container">
+                <div className="main-content">
+                    {this.props.children}
+                </div>
+            </div>
+        );
+    }
+
+}