feat: add configurable media collection name

Author: jimlambie

config.js

@@ -291,6 +291,11 @@ var conf = convict({
       format: Boolean,
       default: false
     },
+    collection: {
+      doc: 'The name of the API collection to store the metadata for uploaded media',
+      format: String,
+      default: 'mediaStore'
+    },
     storage: {
       doc: 'Determines the storage type for uploads',
       format: ['disk', 's3'],

dadi/lib/controller/media.js

@@ -12,6 +12,8 @@ var streamifier = require('streamifier')
 var Model = require(path.join(__dirname, '/../model'))
 var StorageFactory = require(path.join(__dirname, '/../storage/factory'))
 
+var collectionName = config.get('media.collection')
+
 var schema = {
   'fields': {
     'fileName': {
@@ -54,7 +56,7 @@ var schema = {
 }
 
 var MediaController = function () {
-  this.model = Model('_media', schema.fields, null, schema.settings, null)
+  this.model = Model(collectionName, schema.fields, null, schema.settings, null)
 }
 
 MediaController.prototype.post = function (req, res, next) {