RFR: 8023978: [TEST_BUG] launcher tests must exclude platforms without server vm

[Kumar Srinivasan]

Hello,

Please review fixes to the launcher tests, which allows for missing
server vm variant.

All SE platforms have server vm, however  Embedded SE systems do
not contain server, most of them have client, thus these
tests needed to be compensated for that.

http://cr.openjdk.java.net/~ksrini/8023978/webrev.0/

Thanks
Kumar