<!--- 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 -->

config_mgr = self.host.configManager.vsanSystem
        if config_mgr is None:
            return {
                'vsan_cluster_uuid': None,
                'vsan_node_uuid': None,
                'vsan_health': "unknown",
            }
        status = config_mgr.QueryHostStatus()
        return {
            'vsan_cluster_uuid': status.uuid,
            'vsan_node_uuid': status.nodeUuid,
            'vsan_health': status.health,
        }
    def get_cpu_facts(self):
        return {
            'ansible_processor': self.host.summary.hardware.cpuModel,
            'ansible_processor_cores': self.host.summary.hardware.numCpuCores,
            'ansible_processor_count': self.host.summary.hardware.numCpuPkgs,
            'ansible_processor_vcpus': self.host.summary.hardware.numCpuThreads,
        }
    def get_memory_facts(self):
        return {
            'ansible_memfree_mb': self.host.hardware.memorySize // 1024 // 1024 - self.host.summary.quickStats.overallMemoryUsage,
            'ansible_memtotal_mb': self.host.hardware.memorySize // 1024 // 1024,
        }
    def get_datastore_facts(self):