<!--- Verify first that your feature was not already discussed on GitHub -->
<!--- Complete *all* sections as described, this form is processed automatically -->

##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Now "vmware_host_facts" module returns the ESXi version and build number, no update version info, so request getting that info too.
References:
https://www.virtuallyghetto.com/2016/08/quick-tip-how-to-retrieve-the-esxi-update-level-using-the-vsphere-api.html
MOB path:
https://esxi_hostname/mob/?moid=ha-adv-options&doPath=setting%5b%22Misc.HostAgentUpdateLevel%22%5d




##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
vmware_host_facts
##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Some features of ESXi are introduced in specific ESXi update release, so it's better to get that info and use it as a condition before some tasks. 
<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can also paste gist.github.com links for larger files -->

],
        "ansible_memfree_mb": 2702,
        "ansible_memtotal_mb": 4095,
        "ansible_os_type": "vmnix-x86",
        "ansible_processor": "Intel Xeon E312xx (Sandy Bridge)",
        "ansible_processor_cores": 2,
        "ansible_processor_count": 2,
        "ansible_processor_vcpus": 2,
        "ansible_product_name": "KVM",
        "ansible_product_serial": "NA",
        "ansible_system_vendor": "Red Hat",
        "ansible_uptime": 1791680,
        "ansible_uuid": "4c4c4544-0052-3410-804c-b2c04f4e3632",
        "ansible_vmk0": {
            "device": "vmk0",
            "ipv4": {
                "address": "10.76.33.100",
                "netmask": "255.255.255.0"
            },
            "macaddress": "52:54:00:56:7d:59",
            "mtu": 1500
        },
        "vsan_cluster_uuid": null,
        "vsan_node_uuid": null,
        "vsan_health": "unknown",
        "tags": [
            {
                "category_id": "urn:vmomi:InventoryServiceCategory:8eb81431-b20d-49f5-af7b-126853aa1189:GLOBAL",
                "category_name": "host_category_0001",
                "description": "",