zfs: Cannot pass additional arguments to zpool create

[Jean-Baptiste Lallement]

Current definition of zpool_create doesn't allow to pass additional arguments to zpool create:

[curtin/block/zfs.py]
def zpool_create(poolname, vdevs, mountpoint=None, altroot=None,
                 pool_properties=None, zfs_properties=None):

then further in the code, "options" is a list of hardcoded options. There are cases where we want to pass additional options. For exemple with GRUB on zfs we want to disable all the features with '-d' then enabling specific features supported by GRUB.

The number of options is rather limited so it could be done generically by allowing to pass any option or just add a property to the yaml schema to disable all the features.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: curtin (not installed)
ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
Uname: Linux 5.0.0-8-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu26
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 9 08:34:30 2019
InstallationDate: Installed on 2014-07-15 (1728 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
SourcePackage: curtin
UpgradeStatus: Upgraded to disco on 2018-03-24 (380 days ago)