DKMS on Lustre servers

spl(required by zfs), zfs and lustre-zfs are all using dkms on all OSS to build their kernel modules automatically once the system has a new kernel.

To manually build and install the kernel modules from dkms, please note spl needs to be built before zfs.

 #dkms build spl -v 0.7.13 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#dkms build zfs -v 0.7.13 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#dkms build lustre-zfs -v 2.12.3 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#dkms install spl -v 0.7.13 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#dkms install zfs -v 0.7.13 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#dkms install lustre-zfs -v 2.12.3 -k 3.10.0-1062.1.1.el7_lustre.x86_64
#modprobe zfs
#modprobe lustre