Bug 565418 - Use lazy cleanup in JDT debug

Change requested by Sarika in
https://git.eclipse.org/r/c/jdt/eclipse.jdt.debug/+/166639/1/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/BreakpointMarkerUpdater.java

Change-Id: Ia937a7c99d5c629a4c40694f51245127c1d4be1c
1 file changed