Add login page

Change-Id: I167f6492aa2608558bf2ac4e6604dd584de6db66

src/components/LoginPage.test.js

@@ -0,0 +1,14 @@
+import React from "react";
+import { TestContext } from "react-admin";
+import { shallow } from "enzyme";
+import LoginPage from "./LoginPage";
+
+describe("LoginForm", () => {
+  it("renders", () => {
+    shallow(
+      <TestContext>
+        <LoginPage />
+      </TestContext>
+    );
+  });
+});