Update snapshots for graphql@15's preservation of user-type sortation.

The order of types returned by, e.g. `getImplementation`, will now be
dependent on the order that those types first appear in the schema.

See the referenced issues, the first of which implemented the change and the
second which indicates the motivation.

Ref: graphql/graphql-js#2410
Ref: graphql/graphql-js#2362

Author: abernix

packages/apollo-gateway/src/__tests__/buildQueryPlan.test.ts

@@ -709,10 +709,10 @@ describe('buildQueryPlan', () => {
             {
               topProducts {
                 __typename
-                ... on Book {
+                ... on Furniture {
                   price
                 }
-                ... on Furniture {
+                ... on Book {
                   price
                 }
               }
@@ -747,38 +747,38 @@ describe('buildQueryPlan', () => {
             {
               topProducts {
                 __typename
-                ... on Book {
+                ... on Furniture {
                   price
                   __typename
-                  isbn
+                  upc
                 }
-                ... on Furniture {
+                ... on Book {
                   price
                   __typename
-                  upc
+                  isbn
                 }
               }
             }
           },
           Flatten(path: "topProducts.@") {
             Fetch(service: "reviews") {
               {
-                ... on Book {
-                  __typename
-                  isbn
-                }
                 ... on Furniture {
                   __typename
                   upc
                 }
+                ... on Book {
+                  __typename
+                  isbn
+                }
               } =>
               {
-                ... on Book {
+                ... on Furniture {
                   reviews {
                     body
                   }
                 }
-                ... on Furniture {
+                ... on Book {
                   reviews {
                     body
                   }
@@ -856,25 +856,25 @@ describe('buildQueryPlan', () => {
     const queryPlan = buildQueryPlan(buildOperationContext(schema, query));
 
     expect(queryPlan).toMatchInlineSnapshot(`
-    QueryPlan {
-      Fetch(service: "product") {
-        {
-          product(upc: "") {
-            __typename
-            ... on Book {
-              details {
-                country
+      QueryPlan {
+        Fetch(service: "product") {
+          {
+            product(upc: "") {
+              __typename
+              ... on Furniture {
+                details {
+                  country
+                }
               }
-            }
-            ... on Furniture {
-              details {
-                country
+              ... on Book {
+                details {
+                  country
+                }
               }
             }
           }
-        }
-      },
-    }
+        },
+      }
     `);
   });
 });