Switch to JAVA_TOOL_OPTIONS

[otbutz]

Drop the non-standard JAVA_OPTS and switch to JAVA_TOOL_OPTIONS which is supported by the JVM itself: https://docs.oracle.com/javase/8/docs/platform/jvmti/jvmti.html#tooloptions

Picked up JAVA_TOOL_OPTIONS: -Xms2G -Xmx5G
                                          _
     /\                                  (_)
    /  \      ___   _ __    __ _   _ __   _   _   _   _ __ ___
   / /\ \    / __| | '__|  / _` | | '__| | | | | | | | '_ ` _ \
  / ____ \  | (__  | |    | (_| | | |    | | | |_| | | | | | | |
 /_/    \_\  \___| |_|     \__,_| |_|    |_|  \__,_| |_| |_| |_|

[otbutz]

@F43nd1r

[F43nd1r]

@otbutz I will merge this with the next release, but as it doesn't fix or add anything I don't prioritise it.