MicroProfile Health multi module maven project experiment on Open Liberty App module uses lib module as dependency, lib module defines generic health check. So in the end 2 health checks are supposed to be available in the endpoint response.
cd ~/tmp
wget https://public.dhe.ibm.com/ibmdl/export/pub/software/openliberty/runtime/release/2018-06-19_0502/openliberty-18.0.0.2.zip
unzip -q openliberty-18.0.0.2.zip
wlp/bin/server create mp --template=microProfile1
wlp/bin/server run mp
mvn clean package
cp app/target/microprofile-health.war ~/tmp/wlp/usr/servers/mp/dropins/
curl -v http://localhost:9080/health
Check also response code and invoke it for few times to see some UPs and DOWNs.