RFR (xs) : 8077874 : [TESTBUG] The test com/sun/corba/cachedSocket/7056731.sh should not be run on JRE

[Seán Coffey]

Test bug correction to allow the jdb command to be launched via 
compilejdk parameter where necessary. I've checked for similar usage 
across other corba tests and this one seems to be the only one. Also 
made a small edit to use the $JAVA variable where possible. (was already 
defined)

bug report : https://bugs.openjdk.java.net/browse/JDK-8077874
webrev : http://cr.openjdk.java.net/~coffeys/webrev.8077874.jdk9/webrev/

-- 
Regards,
Sean.