some kotlin adjustments

2 jobs for master in 29 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
failed build #235

00:00:29

failed build #233

00:00:38

 
Name Stage Failure
failed
build Build There has been a runner system failure, please try again
Using Docker executor with image openjdk:11-jdk ...
Pulling docker image openjdk:11-jdk ...
ERROR: Preparation failed: no matching manifest for linux/arm/v7 in the manifest list entries (docker.go:143:2s)
Will be retried in 3s ...
Using Docker executor with image openjdk:11-jdk ...
Pulling docker image openjdk:11-jdk ...
ERROR: Preparation failed: no matching manifest for linux/arm/v7 in the manifest list entries (docker.go:143:2s)
Will be retried in 3s ...
ERROR: Job failed (system failure): no matching manifest for linux/arm/v7 in the manifest list entries (docker.go:143:2s)