Cloned from launchpad blueprint https://blueprints.launchpad.net/horizon/+spec/horizon-multiple-objects-uploading.

Description:

Summary
=======
The goal is to allow the upload multiple objects to a Container using Horizon
Object Store module.

Motivation
 ========
Currently it is possible to upload only one object to a container. If the user wants
to upload multiple objects it is necessary to do the same thing many times. With
this blueprint, it will be able to upload more than one object at a time.

Description
=========
The Swift module is able to upload many objects with a single CLI command.
Example: swift upload container object1 object2 object3
Thus modifying the way to upload many objects and at the same time being
capable of setting different object names and different paths. Showing their
names on the modal page similar to how the name is now shown for a single
object upload.

UX
===
[1]
The Users will be able to select more than one object on the window File Upload.
[2]
The Users can change the name of objects if they want. After the objects are selected
the moldal of Upload Object should show all Object Names default it got from
object file selected (name of the local file) and show in distinct input label, similar to now.
[3]
The Users can choose objects from different path. After the selection of some objects,
the users can click on Browser button and choose another object from other
path in their machines.
[4]
The Users can delete (cancel) files selected to upload if they change opinion.
[5]
The files will be uploaded in the same container/pseudo-folder like they are uploaded currently.

Testing
======
Verify the objects were uploaded properly.
Also verify if the objects are equal to the original avoiding problems of
inconsistencies.

Outside Dependencies
==================
N/A

Requirements Update Required
========================
N/A

Doc Impact
=========
N/A

Specification URL (additional information):

https://etherpad.openstack.org/p/r.LXfW9bERNo6RzY2R