Remove test classes from test-infra, and include everything under main

[Croway]

During the spring boot 4 upgrade work I noticed that test-infra module structure can be improved in particular, before each test-infra module split code between src/main (infrastructure services, container implementations) and src/test (service factories, JUnit extensions). This produced two JARs per module: a regular JAR and a test-jar via maven-assembly-plugin.

Now all code lives in src/main. Each module produces a single JAR. The assembly plugin and test-jar goals are removed.

Changes made:

• Moved src/test/java -> src/main/java in 60 test-infra modules
• Removed assembly plugin from test-infra/pom.xml
• Removed test-jar plugin from camel-test-infra-parent/pom.xml
• Changed JUnit and testcontainers dependency scopes from test to compile in the parent POM (safe because consumers always use test-infra in test)
• Removed ~113 test-jar dependency entries from component POMs
• Removed ~60 duplicate camel-test-infra-common and redundant testcontainers entries from test-infra module POMs

Improvements

• 1 dependency instead of 2 per test-infra module in every consumer
• ~170 fewer dependency declarations across the codebase
• Simpler build, no assembly plugin, no test-jar packaging
• camel-jbang infra continues to work unchanged (it already downloaded the regular JAR)
• No behavioral changes, all classes remain in the same packages, all tests pass

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[Croway]

@davsclaus @jamesnetherton @oscerd there are Camel projects that uses the test-jar test-infra dependencies

• camel-spring-boot
• camel-quarkus
• camel-kafka-connector

These project need to be updated, in particular, the test-infra test-jar dependencies has to be removed, and only the test-infra dependencies with test scope should be used instead.

[davsclaus]

awesome I had problemes with that test-jar surprise recently - nice its just a normal JAR

[Croway]

most probably camel-quarkus is not an issue @jamesnetherton is it right? camel-quarkus is not using camel test-infra test-jars

[davsclaus]

you are welcome to create a github ticket for CKC so its not forgotten there - though we dont have bandwith to maintain this project.

[davsclaus]

4.19 upgrade doc needs to be updated

[Croway]

I am aligning CKC and Camel Spring Boot, I do hope CKC mvn verify will work on the first try

[Croway]

camel kafka connector main is using camel 4.14, I won't update it than, if camel kafka connector will be updated to camel 4.19+, the changes to be done will be mentioned in the upgrade guide.

[Croway]

This is the only related change needed apache/camel-spring-boot#1672