Some roles depend on JAVA_HOME set in java_env.sh.

JIRA INFRA-1405

This is still the version used by many applications.
So variable java_install_oracle_jdk8 set to true by default.
This can be changed when most applications use openjdk.

JIRA INFRA-1405

Several applications still require it as default (like OpenXAL)

JIRA INFRA-1405

There is no free LTS for openjdk 11 or javaFX 11 (only commercial
support).
See https://jdk.java.net/11/ and
https://gluonhq.com/services/javafx-support/

JIRA INFRA-1405

JIRA INFRA-894 #action In Progress

Can also install oracle-jdk8 and maven if requested.

JIRA INFRA-643