[516500] Cache preference value whether to process proxies

2% of the overall time to do a compare-with-head on a large logical
model is spent looking up the resolution scope in the preferences in
LocalMonitoredProxyCreationListener and
RemoteMonitoredProxyCreationListener.

We should determine and cache this value once.

Bug: 516500
Change-Id: Iaf2032627456236c8330b2261c608848d85f7a12
Signed-off-by: Philip Langer <planger@eclipsesource.com>
5 files changed