OpenAPI: skip failing collections (#1577)

[tomkralidis]

Overview

Skips failing collections on OpenAPI document generation

Related Issue / discussion

Fixes #1577

Additional information

Dependency policy (RFC2)

• [x] I have ensured that this PR meets RFC2 requirements

Updates to public demo

• [x] I have ensured that breaking changes to the pygeoapi master demo server have been addressed
  • [ ] https://github.com/geopython/demo.pygeoapi.io/blob/master/services/pygeoapi_master/local.config.yml

Contributions and licensing

(as per https://github.com/geopython/pygeoapi/blob/master/CONTRIBUTING.md#contributions-and-licensing)

• [x] I'd like to contribute [feature X|bugfix Y|docs|something else] to pygeoapi. I confirm that my contributions to pygeoapi will be compatible with the pygeoapi license guidelines at the time of contribution
• [x] I have already previously agreed to the pygeoapi Contributions and Licensing Guidelines

[pvgenuchten]

Tom, how is the administrator made aware of a failing collection, if a failing collection is skipped from the index, it may be hard to identify a failing collection

[tomkralidis]

Good idea as well @pvgenuchten. Added to PR (default behaviour is to fail).