Add log of notifications to API integration page

Now that we’ve removed simulated notifications from the dashboard and
activity pages they’re not visible anywhere in the app.

While they should’t be visible to non-technical users, developers have
a real need for Notify to confirm that their code is doing what they
expect. This is needed especially when they’re just getting started with
Notify.

There’s no way of seeing this info from the API either, because a key
can only get notifications created with a key of that type.

It doesn’t make sense to make this a ‘mode’ of the dashboard or activity
because the information about notifications that developers need is
also different. So this commit adds up to 50 of the most recent
notifications sent via the API to the page that developers use as their
‘home’ page.

This also lets us explain the 7 days thing to developers via the
empty slate state of this area of the page.

app/main/views/api_keys.py

@@ -2,7 +2,7 @@ from flask import request, render_template, redirect, url_for, flash
 from flask_login import login_required
 from app.main import main
 from app.main.forms import CreateKeyForm, Whitelist
-from app import api_key_api_client, service_api_client, current_service
+from app import api_key_api_client, service_api_client, notification_api_client, current_service
 from app.utils import user_has_permissions
 from app.notify_client.api_key_api_client import KEY_TYPE_NORMAL, KEY_TYPE_TEST, KEY_TYPE_TEAM
 
@@ -12,7 +12,12 @@ from app.notify_client.api_key_api_client import KEY_TYPE_NORMAL, KEY_TYPE_TEST,
 @user_has_permissions('manage_api_keys')
 def api_integration(service_id):
     return render_template(
-        'views/api/index.html'
+        'views/api/index.html',
+        api_notifications=notification_api_client.get_notifications_for_service(
+            service_id=service_id,
+            include_jobs=False,
+            include_from_test_key=True
+        )
     )