…s virtual hardware platform

(Commit 1 of 5: requires 4 following commits for CP-11136.)

This code change is only to add virtual hardware platform
infrastructure in XenServer Host. VM migration will be blocked if
virtual hardware platform not support.

With this infrastructure, we can add virtual hardware platform
information in other feature.

Signed-off-by: Cheng Zhang <cheng.zhang@citrix.com>
(cherry picked from commit 593b8e6)

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

Conflicts:

	ocaml/idl/datamodel.ml
	ocaml/xapi/xapi_globs.ml
	ocaml/xapi/xapi_host.ml
	ocaml/xapi/xapi_vm_helpers.ml

(Commit 2 of 5 commits for CP-11136.)

Signed-off-by: chengz <cheng.zhang@citrix.com>
(cherry picked from commit c265b0d)
(only selected parts cherry-picked)

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

Conflicts:

	ocaml/xapi/xapi_host.ml

(Commit 3 of 5 commits for CP-11136.)

Together with the previous two CP-11136 commits, this feature for
the Virtual Hardware Platform versioning is complete (and believed
correct) but we intend to change the names "virt_hw_vn" and
"virt_hw_vns" to be longer and more descriptive.

Changes in this commit:

* Define new error (about vm/host version mismatch, not about 6.5SP1).
* Increment minor version no. of datamodel schema and cream release.
* Fix doc strings.
* Host creation: no parameter to specify the supported versions.
* Default [0L] for host's supported versions, when creating host.
* (Due to the above) No special-case in check when VM has version 0.
* VM hardware platform version is read-write in datamodel now.
* Check for version compatibility in the right places.
* More comments.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>
(cherry picked from commit 1267f24)
(only some parts cherry-picked; slight changes)

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

Conflicts:

	ocaml/idl/datamodel.ml
	ocaml/xapi/xapi_globs.ml
	ocaml/xapi/xapi_host.ml
	ocaml/xapi/xapi_vm_helpers.ml

(Commit 4 of 5 for CP-11136.)

Change from VM.virt_hw_vn and Host.virt_hw_vns to
VM.hardware_platform_version and
Host.virtual_hardware_platform_versions

Signed-off-by: Cheng Zhang <cheng.zhang@citrix.com>
(cherry picked from commit 590437f)

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

Conflicts:

	ocaml/idl/datamodel.ml
	ocaml/xapi/xapi_host.ml
	ocaml/xapi/xapi_vm_helpers.ml

The fifth and last commit for this feature.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

Signed-off-by: Kaifeng Zhu <kaifeng.zhu@citrix.com>

In xapi_vm_helpers.ml, the "Client" identifier was binding to a
module in Xenstore.  Fixed by no longer opening the Xenstore module.

Commit 6 of 7 for this feature.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

The seventh and last commit for this feature.
This is just to improve readability.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>

This code change is to add “pci_pv” into VHPs.

Will update VM’s VHP on pci_pv supported Host to 2;
Add VHP refresh on both VM clean_reboot and hard_reboot.

Signed-off-by: Cheng Zhang <cheng.zhang@citrix.com>

1. Introduce network_paths_optimized and storage_paths_optimized flags to vm_guest_metrics.
   They are used to represent if VM is using PV network and PV storage frontends.
   XenCenter could display them respectively.
2. Update the computation of PV_drivers_up_to_date.
   The value is logical AND of network_paths_optimized and storage_paths_optimized.
   Also deprecate this flag since the network and storage flags are introduced.

Signed-off-by: Hui Zhang <hui.zhang@citrix.com>

CP-10531: Update vm_guest_metrics to implement PV drivers update

Windows PV auto-update feature support

Signed-off-by: chengz <cheng.zhang@citrix.com>