Default to reverse ordering by ID in APIs

Adjusts the affected tests to assume the
exact current set of default test data.

These tests were also testing the exact
same query URL, so they've been consolidated
into a single test.

README.rst

@@ -208,9 +208,9 @@ module builds are displayed. These parameters are:
   value defaults to 1.
 - ``per_page`` - Specifies how many items per page should be displayed
   (e.g. ``per_page=20``). This value defaults to 10.
-- ``order_by`` - a database column to order the API by in ascending order. This defaults to
+- ``order_by`` - a database column to order the API by in ascending order.
+- ``order_desc_by`` - a database column to order the API by in descending order. This defaults to
   ``id``.
-- ``order_desc_by`` - a database column to order the API by in descending order.
 
 An example of querying the "module-builds" resource with the "per_page" and the "page"
 parameters::
@@ -226,7 +226,7 @@ parameters::
     {
       "items": [
         {
-          "id": 123,
+          "id": 124,
           "koji_tag": "module-de66baf89b40367c",
           "name": "testmodule",
           "owner": "mprahl",
@@ -257,7 +257,7 @@ parameters::
           "version": "20171005183359"
         },
         {
-          "id": 124,
+          "id": 123,
           "koji_tag": "module-4620ad476f3d2b5c",
           "name": "testmodule",
           "owner": "mprahl",
@@ -293,10 +293,10 @@ parameters::
         "last": "http://mbs.fedoraproject.org/module-build-service/1/module-builds/?per_page=2&page=340",
         "next": "http://mbs.fedoraproject.org/module-build-service/1/module-builds/?per_page=2&page=2",
         "page": 1,
-        "pages": 340,
+        "pages": 60,
         "per_page": 2,
         "prev": null,
-        "total": 1020
+        "total": 120
       }
     }
 
@@ -319,7 +319,7 @@ parameters::
             57047,
             57048
           ],
-          "id": 123,
+          "id": 124,
           "koji_tag": "module-de66baf89b40367c",
           "modulemd": "...."
           "name": "testmodule",
@@ -365,7 +365,7 @@ parameters::
             57045,
             57046
           ],
-          "id": 124,
+          "id": 123,
           "koji_tag": "module-4620ad476f3d2b5c",
           "modulemd": "...."
           "name": "testmodule",
@@ -412,10 +412,10 @@ parameters::
         "last": "http://mbs.fedoraproject.org/module-build-service/1/module-builds/?verbose=true&per_page=2&page=340",
         "next": "http://mbs.fedoraproject.org/module-build-service/1/module-builds/?verbose=true&per_page=2&page=2",
         "page": 1,
-        "pages": 340,
+        "pages": 120,
         "per_page": 2,
         "prev": null,
-        "total": 1020
+        "total": 60
       }
     }
 
@@ -460,7 +460,7 @@ and the "submitted_before" parameters::
     {
       "items": [
         {
-          "id": 1,
+          "id": 3,
           "state": 3,
           ...
         },
@@ -470,7 +470,7 @@ and the "submitted_before" parameters::
           ...
         },
         {
-          "id": 3,
+          "id": 1,
           "state": 3,
           ...
         }