* Fixed the core-kotlin module to build, and set it up to run JUnit 5 tests using Failsafe * Example JUnit5 tests in Kotlin
* fix spring config * fix spring config * fix spring config * minor fix * fix spring-boot module * fix pom * upgrade jackson * minor fix * java concurrency * cleanup * fix conflict * java 8 * clean up * add core-java-8 to main pom * rename kotlin to core-kotlin