RFR(XS) 8158060: BasicLayerTest causes fatal error: Thread holding lock at safepoint that vm can block on: Module_lock

[harold seigel]

Hi,

Please review this small change to fix bug 8158060.  The fix moves the 
exception throw to outside of the block containing the module lock.

JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8158060

Open webrev: http://cr.openjdk.java.net/~hseigel/bug_8158060/

The fix was tested with an RBT nightly test run and with the failing test.

Thanks, Harold