This enables us to have multiple QmlProfilerTool instances without
conflicting action registrations. Ultimately there should be a way to
unregister actions, or to add some extra description on which tool
instance they refer to, but this is a minimal first step.
The main problem this fixes for now is the warnings generated by the
tests.
Change-Id: I2193fc48a5a68c52f46e5567919f3035bc93df36
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
