Have authorise handle key errors when getting group names from ids

[wxtim]

This is a small change with no associated Issue.

Description of issue:

I got KeyError from cylc.uiserver.authorise.parse_group_ids because my profile is messed up and keys I wanted were not available.

Description of response

• Added an exception for this case, and created logging for it too.
• Additionally discovered that the logging in authorise.py wasn't working, so modified the app.py to pass the logger object in.

Requirements check-list

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Appropriate tests are included (unit and/or functional).
• Appropriate change log entry included.
• No documentation update required.
• No dependency changes.

[oliver-sanders]

Looks good, haven't manually tested, MyPy is unhappy for some reason.

[codecov-commenter]

Codecov Report

Merging #272 (c683dee) into master (fea9786) will decrease coverage by 0.06%.
The diff coverage is 84.21%.

❗ Current head c683dee differs from pull request most recent head 13a1218. Consider uploading reports for the commit 13a1218 to get more accurate results

@@            Coverage Diff             @@
##           master     #272      +/-   ##
==========================================
- Coverage   77.62%   77.55%   -0.07%     
==========================================
  Files          12       12              
  Lines        1001     1007       +6     
  Branches      173      175       +2     
==========================================
+ Hits          777      781       +4     
  Misses        195      195              
- Partials       29       31       +2     

Impacted Files	Coverage Δ
cylc/uiserver/app.py	86.44% <ø> (ø)
cylc/uiserver/authorise.py	84.84% <84.21%> (-0.49%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fea9786...13a1218. Read the comment docs.

[datamel]

I have currently working groups so I can not manually check this. I have read the code and am happy with the logic. Thanks @wxtim, and good catch on the issue!

[oliver-sanders]

@datamel happy to merge?

[wxtim]

Worth saying that it seems to work for Dave.