Update src/rviz/ogre_helpers/ogre_logging.cpp

Fix the ms_Singleton assertion error when loading rviz as rqt plugin.
Fix #553, loading rviz as an rqt_gui plugin crashes.
Attempt at fix for #561.
Moved ResourceIOSystem::Close() out of class definition to see if it fixes a vtable issue on ARMHF platform.
Merge branch 'mjcarroll-groovy-devel' into groovy-devel