Fix Dask scheduler Client import error

[mattw-nws]

Description

Introduced in #967, f863b48, tethys_compute/models/dask/dask_scheduler.py , the changed code has lowercase client instead of Client, which imports the module instead of the class, resulting in a TypeError: 'module' object is not callable error.

Changes Made to Code:

• Client = optional_import("client", from_module="dask.distributed") ➡️ Client = optional_import("Client", from_module="dask.distributed")

Related

• 967

Additional Notes

• This bug might not appear on macOS HFS+/APFS because of case-insensitive filesystems? But I'm seeing it on Windows. I'm guessing this is the case everywhere though.

Quality Checks

• [x] New code is 100% tested
• [x] Code has been formated
• [x] Code has been linted
• [x] Docstrings for new methods have been added

[coveralls]

coverage: 100.0%. remained the same when pulling c3f534994604a1cdae332cf0e803d7c5bc4746b3 on mattw-nws:bug-dask-scheduler-module-not-callable into 8680dcfc8595c30bf4e47be110d7f0fb5d1b9f60 on tethysplatform:main.