Failing CI flaky tests - pydap 3.5.1 contains only client dependencies

[kmuehlbauer]

What is your issue?

The pydap conda package currently as of version 3.5.1 installs only the client dependencies to provide a lightweight package for the majority of users. I've opened conda-forge/pydap-feedstock#23 to discuss options for creating a pydap-server package.

@pydata/xarray In the meantime we would need to add the additional dependencies by ourselves in environment.yml.

[kmuehlbauer]

In #9709 the needed dependencies have been added to ci/environment.yml. Keeping this open until a final solution has been sorted out upstream.