Change Catalog to use v2 API endpoint for courses (#1987)

* swap catalog to use v2

* tests, lint, fmt

frontend/public/src/containers/pages/CatalogPage.js

@@ -8,7 +8,7 @@ import {
   coursesNextPageSelector,
   coursesQuery,
   coursesQueryKey
-} from "../../lib/queries/courses"
+} from "../../lib/queries/catalogCourses"
 
 import {
   programsSelector,

frontend/public/src/containers/pages/CatalogPage_test.js

@@ -713,7 +713,7 @@ describe("CatalogPage", function() {
 
     sinon.assert.calledWith(
       helper.handleRequestStub,
-      "/api/courses/?page=2&live=true&page__live=true&courserun_is_enrollable=true",
+      "/api/v2/courses/?page=2&live=true&page__live=true&courserun_is_enrollable=true",
       "GET"
     )
 

frontend/public/src/lib/queries/catalogCourses.js

@@ -0,0 +1,24 @@
+import { pathOr } from "ramda"
+
+import { nextState } from "./util"
+
+export const coursesSelector = pathOr(null, ["entities", "courses", "results"])
+
+export const coursesNextPageSelector = pathOr(null, [
+  "entities",
+  "courses",
+  "next"
+])
+
+export const coursesQueryKey = "courses"
+
+export const coursesQuery = page => ({
+  queryKey:  coursesQueryKey,
+  url:       `/api/v2/courses/?page=${page}&live=true&page__live=true&courserun_is_enrollable=true`,
+  transform: json => ({
+    courses: json
+  }),
+  update: {
+    courses: nextState
+  }
+})