automated test for CAP dissappeared

[maaikelimper]

I just noted that the automated test that I added while working on the CAP integration did not make it to the main-branch

This is the addition I made for PR731:

wis2box/.github/workflows/tests-docker.yml

Lines 59 to 66 in 5c4df3b

	- name: add CAP data, cap-publish
	DISCOVERY_METADATA: /data/wis2box/metadata/discovery/int-wmo-test-cap.yml
	DISCOVERY_METADATA_ID: urn:wmo:md:int_wmo_test:cap
	run: |
	python3 wis2box-ctl.py execute wis2box dataset publish $DISCOVERY_METADATA
	curl -s http://localhost/oapi/collections/discovery-metadata/items/$DISCOVERY_METADATA_ID --output /tmp/$DISCOVERY_METADATA_ID
	check-jsonschema --schemafile /tmp/wcmp2-bundled.json /tmp/$DISCOVERY_METADATA_ID
	python3 tests/send_CAP_as_message.py

This is the current status in main (no CAP test)
https://github.com/wmo-im/wis2box/blob/main/.github/workflows/tests-docker.yml

I will make a new PR to re-add the automated testing for CAP publishing in the wis2box repository

@efucile FYI