Allow configuration options for Postgres (#2873)

* Allow configuration options for Postgres

* Fix the use of incorrect options object.

* Refactor and test the postgres config parser.

* Remove unnecessary try/catch

* Remove unnecessary try/catch

* Add blank line at the end of the test file

* Rename file for consistency purposes

src/ParseServer.js

@@ -260,7 +260,8 @@ class ParseServer {
       case 'postgres:':
         return new PostgresStorageAdapter({
           uri: databaseURI,
-          collectionPrefix
+          collectionPrefix,
+          databaseOptions
         });
       default:
         return new MongoStorageAdapter({