* Clean up code style in Gradle configs * Fix JavaDoc errors * Make JUnit 4 as `optional` dependency for `spring-integration-test-support` * Remove redundant `javax.activation-api` from some modules
* Clean up code style in Gradle configs * Fix JavaDoc errors * Make JUnit 4 as `optional` dependency for `spring-integration-test-support` * Remove redundant `javax.activation-api` from some modules