This commit addresses the issue encountered when updating the
subcloud fields directly with a file introduced by [1]. This
caused issues because the file would be closed, making the content
inaccessible. Now, we update the fields using the file content.
An intermittent error, introduced by [2], was fixed in the
test_prestage_with_subcloud_id test.
[1]: https://review.opendev.org/c/starlingx/distcloud-client/+/909454
[2]: https://review.opendev.org/c/starlingx/distcloud-client/+/909975
Test Plan:
PASS: Create a subcloud
PASS: Update a subcloud
PASS: Create a subcloud backup
PASS: Subcloud deploy create
PASS: Subcloud deploy upload
Closes-bug: 2055446
Change-Id: Ib8b831353dba9d073131eb1c12ccd57513c63e7f
Signed-off-by: Hugo Brito <hugo.brito@windriver.com>
d847780a4d