Update dracut version requirement within the kernel

Update dracut version requirement within the kernel

dracut used script /usr/share/dracut/modules.d/90kernel-modules/installkernel
to determine if would add the block driver to initramfs. On earlier UEK2 kernel,
blk_init_queue still been used by xen-blkfront.c, but after changed it to MQ
support(commit 907c3eb18e0), the call had been replaced.
Update the required version of dracut (>= 004-347), would fix the issue.

Orabug: 28873097

Signed-off-by: Jie Li <jie.l.li@oracle.com>
Reviewed-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>