Using the sed script from
https://gitlab.com/gitlab-org/gitlab-ce/issues/59758

Webmock 3.1.0 changed the behavior to return `nil` for the body if an
HTTP 204 No Content response were received
(https://github.com/bblimke/webmock/commit/b837e642782501a6904d0cb1aad391dd6f49ada3).

Update the Bitbucket Server connection to ignore these No Content
response codes.

The importer would display a 500 error page if you attempted to import
using a non-existent DNS entry. This commit rescues known network issues
and consolidates them into
BitbucketServer::Connection::ConnectionError`.  The previous error
handling in the paginator doesn't work because it returns a lazy
collection.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56154

The change to paginate repos in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/22825 caused the
paginator to stop after 25 pull requests because the limit was set to 25
if none was defined. To fix this, we should only stop if the limit has
actually been set and use the limit parameter to determine the maximum
number of items to process per page.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/55914

To prevent delays in loading the page and reduce memory usage, limit the
number of projects shown at 25 per page.

Part of https://gitlab.com/gitlab-org/gitlab-ce/issues/50021