forms: add support for UNICAST image restore

Add UNICAST and UNICAST-DIRECT to the image restore form.
UNICAST-DIRECT will transfer the images through a samba share
and proceed with the restore process without using any cache
partition.
UNICAST will try to first copy the image to the cache partition
and generate the full.sum file. Then the restore process is
executed.

ogcp/forms/action_forms.py

@@ -104,7 +104,9 @@ class ImageRestoreForm(FlaskForm):
     partition = SelectField(label=_l('Partition'), choices=[])
     image = SelectField(label=_l('Image'), choices=[])
     method = SelectField(label=_l('Method'),
-                         choices=[('TIPTORRENT', 'TIPTORRENT')])
+                         choices=[('TIPTORRENT', 'TIPTORRENT'),
+                                  ('UNICAST', 'UNICAST'),
+                                  ('UNICAST-DIRECT', 'UNICAST-DIRECT')])
     restore = SubmitField(label=_l('Restore'))
 
 class RepoForm(FlaskForm):