test: add checks for avoiding a timing issue, that is the path dropdown list needs more time to load

[packit-as-a-service[bot]]

We were not able to find or create Copr project packit/cockpit-project-cockpit-machines-1727 specified in the config with the following error:

Cannot create a new Copr project (owner=packit project=cockpit-project-cockpit-machines-1727 chroots=['centos-stream-9-x86_64', 'centos-stream-10-x86_64']): Copr: 'packit/cockpit-project-cockpit-machines-1727' already exists. Copr HTTP response is 400 BAD REQUEST.

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Unless the HTTP status code above is >= 500, please check your configuration for:

1. typos in owner and project name (groups need to be prefixed with @)
2. whether the project name doesn't contain not allowed characters (only letters, digits, underscores, dashes and dots must be used)
3. whether the project itself exists (Packit creates projects only in its own namespace)
4. whether Packit is allowed to build in your Copr project
5. whether your Copr project/group is not private

[martinpitt]

Hello @yunmingyang ! This looks a bit dubious -- to understand the failure, do you have a link to the failed run? Or can you copy the output and the screenshot from the failure?

[yunmingyang]

@martinpitt I found this during downstream aarch64 testing, I am not sure whether it could be reproduced, but let me have a try later

[yunmingyang]

Hi @martinpitt, I could also reproduce it during s390x test, but I think maybe there are some security information in .js.log and .html, like IP address and firmware, Thus, I just put the picture here. You could see there are two errors shown, but it should just 1 error, as "Source path" is already not empty.

[yunmingyang]

Re-push:

• Add more annotation for explaining
• Remove the b.wait_attr_contains since set_input_text had already done this