RFR (XS) : JDK-8025671 : Test name changed, test list not updated. Test6878713.sh

[Mikhailo Seledtsov]

Please review this small trivial fix.

     JBS: https://bugs.openjdk.java.net/browse/JDK-8025671
     Webrev: http://cr.openjdk.java.net/~mseledtsov/8025671/webrev.00/ 
<http://cr.openjdk.java.net/%7Emseledtsov/8025671/webrev.00/>

     A trivial fix, removed the reference to the old test Test6878713.sh 
from the TEST.groups file. The new test, 
test/runtime/ClassFile/OomWhileParsingRepeatedJsr.java, does not need to 
be added to the group, because it uses JDKToolFinder library to locate 
the jdk tools.

Thank you,
Misha