Provide valid input in live_content_spec

Removing the compacting has surfaced some more requirements for the
input in the live_content_spec. All of these should be required in order
to publish an edition of the given type, so hopefully we aren't just
filtering out realistic scenarios...

... but this is starting to require quite a bit of test setup overhead

Author: yndajas

spec/integration/graphql/live_content_spec.rb

@@ -1,6 +1,19 @@
 RSpec.describe "Requesting live content by base path" do
   schema_specific_fields = {
-    news_article: { details: { body: "" } },
+    ministers_index: {
+      details: { body: "", reshuffle: {} },
+    },
+    news_article: {
+      details: {
+        body: "",
+        change_history: [],
+        emphasised_organisations: [],
+        first_public_at: "2016-04-11T10:52:00.000+01:00",
+        image: { url: "" },
+        political: false,
+      },
+    },
+    role: { details: { body: "", supports_historical_accounts: false } },
     world_index: {
       details: { world_locations: [], international_delegations: [] },
     },