mussel,test: setUp() -> oneTimeSetUp(). tearDown() -> oneTimeTearDown().
mussel,test: move local variables to setup phase.
mussel,test: split large function to each small step functions.
mussel,test: split setup function to small step functions.
mussel,test: add check_port().
mussel,test: add check_network_connection().
mussel,test: remove unused comment.
mussel,test: fix to define variable.