Fix DevServices for Keycloak loading the realm file from the file system

[sberyozkin]

Fixes #21975

(and also removes an unused shared property in StartResult)

See also quarkusio/quarkus-quickstarts#1001

[stuartwdouglas]

Can you add a test for this?

[sberyozkin]

Hi @stuartwdouglas It is in the linked quickstart PR, I did not want to copy the large realm file here; in oidc_token_propagation which uses Dev Services it is tested that Dev Services does not create a realm. Would that quickstart test do ? I don't mind, I can rework some of the existing tests here around the realm file...

[sberyozkin]

@stuartwdouglas I can update @geoand 's test once #21999 get merged to use a file system path to the realm file, 3 quickstarts currently use the class based resource for testing. Though having only one of the quickstarts checking the file system path should also be OK IMHO, it will fail if the regression is introduced here before the release...

[sberyozkin]

Hi Stuart, @stuartwdouglas It took me awhile to find where I can add the realm file, with a few tries, but finally, integration-tests/oidc-client-reactive-filter has come to the rescue :-). It should do it, thanks

[geoand]

Thanks for this @sberyozkin!

[sberyozkin]

Hi @geoand Can you have a look please since you also worked recently on updating Keycloak Dev Services (and I recall it was a more difficult update than adding a file system bind :-) ) - this PR does that and updates the test

[geoand]

Should this be backported to 2.6 and 2.5?

[sberyozkin]

Thanks for a super fast review @geoand :-)

[sberyozkin]

Yeah, if it can make it to 2.5.x it would be fine, let me add the labels

[geoand]

Great, thanks!