box: recovery_journal -- declare it as static

There is no need for several instances of
recovery journal variable. Lets make it
statically allocated inside recovery_journal_create
routine.

And drop the inline annotation because there is
absolutely no need for this routine being inline.

Suggested-by: Konstantin Osipov <kostja.osipov@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>