RFR: 8238953: tools/jpackage tests do not work on Ubuntu Linux

[Baesken, Matthias]

Hello, please review this small  test related change .

Currently (most of the)  tools/jpackage tests do not work on Ubuntu Linux .
Reason is that the rpm parts of the  jpackage tests  do not pass on this distro .
The  rpm tests  can be disabled by this property :


> >

> > Do you expect  those  tests to work on Ubuntu ?

> No, rpm test are not supposed to pass on Ubuntu.

> To disable running rpm tests on Ubuntu please set

> "jpackage.test.disabledPackagers" system property to "rpm":

> -Djpackage.test.disabledPackagers=rpm.

>

However the tests should set this property   themselves , it is really bad that it must be currently configured from outside .




Bug/webrev :

https://bugs.openjdk.java.net/browse/JDK-8238953

http://cr.openjdk.java.net/~mbaesken/webrevs/8238953.0/


Best regards, Matthias