Storage Pool Add Volume UI: Add APIs to kimchi.api.js

Add API to handle downloand and upload features.

Signed-off-by: Hongliang Wang <hlwang@linux.vnet.ibm.com>
Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Storage Pool Add Volume UI: Add i18n Strings

Add i18n strings for volume download/upload feature.

Signed-off-by: Hongliang Wang <hlwang@linux.vnet.ibm.com>
Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Storage Pool Add Volume UI: Implement Download/Upload Volume Function

Implemented download and upload volumes functions.

Signed-off-by: Hongliang Wang <hlwang@linux.vnet.ibm.com>
Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Storage Pool Add Volume UI: Connect the Feature in Storage Tab

Connect download/upload volume window with storage pool add button.

Signed-off-by: Hongliang Wang <hlwang@linux.vnet.ibm.com>
Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>
Disable upload option while adding a volume to a pool

Upload feature has some issues.
Disable it until we get them fixed.

Signed-off-by: Aline Manera <alinefm@linux.vnet.ibm.com>