quality: web debt batch (tests runner, FireContainer, rate-limit, maps, i18n)

Independent-of-prod quality debt from PENDIENTE.md §2:

- test: migrate broken Jest -> meteortesting:mocha. Tests rewritten to chai +
  Meteor 3 async APIs, moved to test/server/ (server-only). test/server/
  00-setup.test.js re-runs the collection2/accounts init that `meteor test`
  skips (no server/main.js). New comments method + mediaAnalyzers coverage.
  Dropped rest.test.js (removed meteor/http; covered by smoke/). 36 passing.
- fix: scope FireContainer read by the URL _id on the archive route instead of
  a selector-less FiresCollection.findOne() (imports/ui/pages/Fires/Fires.js).
- feat: rate-limit abusable publications via rateLimitSubscriptions (fireFrom*
  and comments.forReference 5/1000ms; geo subs 10/1000ms).
- perf: append loading=async to the Google Maps loader URL (Gkeys.js).
- deps: meteor-accounts-t9n 2.0 -> 2.6 (no gl build -> keep gl->es fallback,
  documented); add 3 missing gl/common.json keys (0 missing now).
- deps: drop jest/babel/enzyme, add chai.

test/server/activeFiresUnion.test.js

@@ -0,0 +1,32 @@
+/* eslint-env mocha */
+/* eslint-disable func-names, prefer-arrow-callback */
+/* eslint-disable import/no-absolute-path */
+
+import { expect } from 'chai';
+import ActiveFiresUnion from '/imports/api/ActiveFiresUnion/ActiveFiresUnion';
+
+const centerid = { type: 'Point', coordinates: [-5.905956029891968, 43.55727622097011] };
+const shape = { type: 'Polygon', coordinates: [[[-5.9084, 43.5558], [-5.906, 43.5558], [-5.906, 43.5566], [-5.9036, 43.5566], [-5.9036, 43.5583], [-5.9061, 43.5583], [-5.9061, 43.558], [-5.9084, 43.558], [-5.9084, 43.5558]]] };
+// `new Date(...)` (the old test used bare `Date(...)`, which yields a string and
+// fails collection2 schema validation on a Date field).
+const fireUnion = { centerid, shape, when: new Date('2018-05-02T16:11:04.617Z') };
+
+describe('activeFireUnion insert', () => {
+  it('should insert fire union', async () => {
+    // Remove any leftover from a previous run
+    const alreadyInserted = await ActiveFiresUnion.findOneAsync({ centerid });
+    if (alreadyInserted) {
+      await ActiveFiresUnion.removeAsync(alreadyInserted._id);
+    }
+
+    const insertedId = await ActiveFiresUnion.insertAsync(fireUnion);
+    ActiveFiresUnion.schema.validate(fireUnion);
+
+    const inserted = await ActiveFiresUnion.findOneAsync(insertedId);
+    delete inserted._id;
+    expect(inserted).to.deep.equal(fireUnion);
+
+    await ActiveFiresUnion.removeAsync(insertedId);
+    expect(await ActiveFiresUnion.find({ _id: insertedId }).countAsync()).to.equal(0);
+  });
+});