[567929] Allow Launch tasks to be run on every startup

https://bugs.eclipse.org/bugs/show_bug.cgi?id=567929

Add new attribute runEveryStartup to Launch task.

Change-Id: I9c29b304bb57a745f1adfe82d37bd4d1cc427d20
Signed-off-by: Joe Shannon <joe.shannon@diamond.ac.uk>
19 files changed