Bug 574652 - fix IAE in "Breakpoints View Update Job"

Serialized execution of breakpoint jobs without SchedulingRule
by using a single job instance with a queue for tasks.

Change-Id: I5c987bd4def191ebb4778c0e68be60badd58a4cf
Signed-off-by: Joerg Kubitz <jkubitz-eclipse@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/182814
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Andrey Loskutov <loskutov@gmx.de>
4 files changed