[KARAF-4150] bin/status fails if KARAF_DEBUG is set

From KARAF-4150:

KARAF-1410 does not set the JPDA Debug options if

if [ "x$MODE" = "xstop" ]; then
    return
fi
if [ "x$MODE" = "xclient" ]; then
    return
fi

but misses out on the bin/status command.
Running bin/status with KARAF_DEBUG enabled, raises the same error as in KARAF-1410.