fix(tests): Update tests to support variable number of collections in test data

fix HIN-1022

packages/component-fixture-manager/src/fixtures/collections.js

 const Chance = require('chance')
-const {
-  user,
-  handlingEditor,
-  answerHE,
-  reviewer,
-  answerReviewer,
-  recReviewer,
-} = require('./userData')
+const { user, handlingEditor, answerHE } = require('./userData')
 const { fragment, reviewCompletedFragment } = require('./fragments')
 const { standardCollID } = require('./collectionIDs')
 

packages/component-manuscript-manager/src/tests/collections/get.test.js

 process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0'
 process.env.SUPPRESS_NO_CONFIG_WARNING = true
 
-const cloneDeep = require('lodash/cloneDeep')
+const { cloneDeep, size } = require('lodash')
 const fixturesService = require('pubsweet-component-fixture-service')
 const requests = require('../requests')
 
@@ -88,7 +88,7 @@ describe('Get collections route handler', () => {
     expect(res.statusCode).toBe(200)
     const data = JSON.parse(res._getData())
 
-    expect(data).toHaveLength(2)
+    expect(data).toHaveLength(size(testFixtures.collections))
     expect(data[0].type).toEqual('collection')
     expect(data[0]).toHaveProperty('visibleStatus')
     expect(data[0].currentVersion.recommendations).toHaveLength(3)