Redirect G4cout to LogVerbatim, trim the trailing newline

Keep redirecting G4cerr to LogWarning, because by default Warnings get
displayed, and when not specifically debugging Oscar(MT)Producer it is
probably nice to know which module issued the message.
Fix ChordFinderSetter and G4Monopole for MT

G4ProcessManager was not set for master thread. Let
G4VUserPhysicsList::InitializeProcessManager() do the G4ProcessManager
initialization. For some reason a G4Transportation process appears to
the G4ProcessManager before reaching
CMSMonopolePhysics::ConstructProcess(), so (for now) just clear the
processes in G4ProcessManager to preserve the old behaviour.
Merge pull request #5470 from makortel/fixmonopole

SimG4Core -- Fix G4Monopole for MT