RFR JDK-8212629: [TEST] wrong breakpoint in test/jdk/com/sun/jdi/DeferredStepTest

[Alex Menkov]

Hi all,

please review trivial fix for
https://bugs.openjdk.java.net/browse/JDK-8212629
webrev:
http://cr.openjdk.java.net/~amenkov/deferredStep_extraBP/webrev/

The fix adds space inside comment to avoid wrong breakpoint parsing 
(breakpoint lines are marked as "@{id} breakpoint", where {id} is an 
integer)

--alex