Remove _allCollections as Parse Server doesn't need it.

Author: drew-gross

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -10,6 +10,21 @@ let MongoClient = mongodb.MongoClient;
 const MongoSchemaCollectionName = '_SCHEMA';
 const DefaultMongoURI = 'mongodb://localhost:27017/parse';
 
+const storageAdapterAllCollections = mongoAdapter => {
+  return mongoAdapter.connect()
+  .then(() => mongoAdapter.database.collections())
+  .then(collections => {
+    return collections.filter(collection => {
+      if (collection.namespace.match(/\.system\./)) {
+        return false;
+      }
+      // TODO: If you have one app with a collection prefix that happens to be a prefix of another
+      // apps prefix, this will go very very badly. We should fix that somehow.
+      return (collection.collectionName.indexOf(mongoAdapter._collectionPrefix) == 0);
+    });
+  });
+}
+
 export class MongoStorageAdapter {
   // Private
   _uri: string;
@@ -86,25 +101,8 @@ export class MongoStorageAdapter {
 
   // Delete all data known to this adatper. Used for testing.
   deleteAllSchemas() {
-    return this._allCollections().then(collections => {
-      let promises = collections.map(collection => collection.drop());
-      return Promise.all(promises);
-    });
-  }
-
-  _allCollections() {
-    return this.connect()
-    .then(() => this.database.collections())
-    .then(collections => {
-      return collections.filter(collection => {
-        if (collection.namespace.match(/\.system\./)) {
-          return false;
-        }
-        //TODO: If you have one app with a collection prefix that happens to be a prefix of another
-        // apps prefix, this will go very very badly. We should fix that somehow.
-        return (collection.collectionName.indexOf(this._collectionPrefix) == 0);
-      });
-    });
+    return storageAdapterAllCollections(this)
+    .then(collections => Promise.all(collections.map(collection => collection.drop())));
   }
 
   // Remove the column and all the data. For Relations, the _Join collection is handled