Got rid of nested class Sandbox_F::Sandbox and moved its setup and teardown code up into class Sandbox_F, because the global instance of Sandbox_F::Sandbox seemed to be causing problems at shutdown.
Got rid of nested class Sandbox_F::Sandbox and moved its setup and teardown code up into class Sandbox_F, because the global instance of Sandbox_F::Sandbox seemed to be causing problems at shutdown.

acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core