Specify any command-line options that JavaTest should set for the Java launcher when it runs the tests on your system.
For example you may want to specify:

  `-Xmx256m -Xms128m`

to change the default maximum and initial Java heap size.
Important!
If you use Java launcher version 8 to run the tests, specify the following option:
On Solaris or Linux platforms, type

  `-Djava.endorsed.dirs=$PATH_TO_jaxb-api.jar`

For example:

  `-Djava.endorsed.dirs=/usr/java/JAXB2.3/lib`

On Win32 systems, type

  `-Djava.endorsed.dirs=%PATH_TO_jaxb-api.jar%`

For example:

  `-Djava.endorsed.dirs=C:\java\JAXB2.3\lib`

Note: The path available to -Djava.endorsed.dirs should only contain jaxb-api.jar
Important!
If you use Java launcher version 9, use this option to pass module options.
For example, for Oracle RI the values are:
`-add-modules java.xml.bind --upgrade-module-path <JAXB-RI-HOME>/lib/jaxb-api.jar`