Add requireFetch false to all bookshelf models

packages/strapi-connector-bookshelf/lib/generate-group-relations.js

@@ -14,6 +14,7 @@ const createGroupModels = async ({ model, definition, ORM, GLOBALS }) => {
     const joinTable = `${collectionName}_groups`;
     const joinColumn = `${pluralize.singular(collectionName)}_${primaryKey}`;
     const joinModel = ORM.Model.extend({
+      requireFetch: false,
       tableName: joinTable,
       group() {
         return this.morphTo(

packages/strapi-connector-bookshelf/lib/mount-models.js

@@ -382,6 +382,7 @@ module.exports = ({ models, target, plugin = false }, ctx) => {
 
           // Define new model.
           const options = {
+            requireFetch: false,
             tableName: `${definition.collectionName}_morph`,
             [definition.collectionName]: function() {
               return this.belongsTo(