Revert "Don't look up project by id if given id"

This reverts commit 042be7c7fe. This
solution worked but it was confusing. The issue that the author was
seeing was presumably due to users not being able to list projects but in
theory the 'openstackclient.image.common.find_project' function that was
being called here should have already handle this. It transpires however
that there was a bug in this and we weren't correctly handling HTTP 403
errors correctly. This bug has since been fixed in change
I2ea2def607ec5be112e42d53a1e660fef0cdd69c meaning this change is no
longer necessary. Remove it and simplify the code somewhat.

Change-Id: I108efec2c8deda50fcb9cc84f313602bed2ac15c
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

openstackclient/image/v2/image.py

@@ -29,7 +29,6 @@ from osc_lib.cli import parseractions
 from osc_lib.command import command
 from osc_lib import exceptions
 from osc_lib import utils
-from oslo_utils import uuidutils
 
 from openstackclient.common import progressbar
 from openstackclient.i18n import _
@@ -184,14 +183,11 @@ class AddProjectToImage(command.ShowOne):
         image_client = self.app.client_manager.image
         identity_client = self.app.client_manager.identity
 
-        if uuidutils.is_uuid_like(parsed_args.project):
-            project_id = parsed_args.project
-        else:
-            project_id = common.find_project(
-                identity_client,
-                parsed_args.project,
-                parsed_args.project_domain,
-            ).id
+        project_id = common.find_project(
+            identity_client,
+            parsed_args.project,
+            parsed_args.project_domain,
+        ).id
 
         image = image_client.find_image(
             parsed_args.image, ignore_missing=False