[9] RFR(XS): 8157717: MultiCommand breaks directives amount limit

[Nils Eliasson]

Hi,

Summary:
The test fail because it generates more directives (up to 100) than the 
default VM settings allows (50). This failure is seen now because the 
test was ignored due to a problem in outputanalyzer which was recently 
fixed.

Solution:
Add flag that increases amounts of directives allowed in target VM.

Testing:
Test change only - verified this test with and without change, with seed 
for reported crash.

Bug: https://bugs.openjdk.java.net/browse/JDK-8157717
Webrev: http://cr.openjdk.java.net/~neliasso/8157717/webrev.01/

Best regards,
Nils Eliasson