staging: lustre: remove strange journal macros into the one file using them

This moves the PUSH_JOURNAL and friend macros into debug.c, as that's
the only place they are used, so why are they even a macro?

Cc: Peng Tao <tao.peng@emc.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>