Quarkus Kafka Client ServiceBinding no longer works with app-services service binding

[DuncanDoyle]

Describe the bug

Since a camelCase/lowerCase bug has been solved in the ServiceBinding operator/sdk, the binding files created by SBO respect the lowercase and uppercase defined in the metadata of the CRD.

Since the KafkaConnection CRD uses camelCase for bootstrapServer, saslMechanism and securityProtocol, and the Quarkus Kafka client uses all lowercase names, service binding for Kafka no longer works.

See: https://github.com/redhat-developer/app-services-operator/blob/main/olm/olm-catalog/rhoas-operator/0.6.7/manifests/rhoas-operator.kafkaconnections.crd.yaml#L6

This has been temporarily fixed in version 0.6.7 of our operator by also specifying full lowercase properties (and thus bindingfiles), but this is only done to support older Quarkus versions. Quarkus should align with the camelCase naming conventions.

Expected behavior

Kafka client service binding works with camelCase binding files.

Actual behavior

Kafka client expects lowercase binding files.

To Reproduce

Use Service Binding with app-services operator < 0.6.7

Environment (please complete the following information):

OpenShift 4.7, App Services Operator < 0.6.7, SBO >=0.6

Quarkus version or git rev

999-SNAPSHOT

Build tool (ie. output of mvnw --version or gradlew --version)

mvn 3.6.3

[quarkus-bot]

/cc @cescoffier, @geoand