Update to Maven 3.8.6

[sparsick]

• Also sync sdkman used version with DroneCI used version
• remove git installation (is already there)
• fix #24

[bmarwell]

Hmmm

+ echo $JAVA_HOME
/opt/java/openjdk
+ mvn -V clean verify --fail-at-end --batch-mode
The JAVA_HOME environment variable is not defined correctly,

Ok, what about using adoptopenjdk/openjdk8-openj9:ubi and mvnw? https://hub.docker.com/r/adoptopenjdk/openjdk8-openj9/

Can do a PR if interested.

[sparsick]

I'm wondering why this image works on my local machine. I think the root cause is drone ci and this I want to find out why