<!--- 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 -->

#
from __future__ import absolute_import, division, print_function
__metaclass__ = type
ANSIBLE_METADATA = {
    'metadata_version': '1.1',
    'status': ['preview'],
    'supported_by': 'community'
}
DOCUMENTATION = r'''
---
module: vmware_host_facts
short_description: Gathers facts about remote ESXi hostsystem
description:
    - This module can be used to gathers facts like CPU, memory, datastore, network and system etc. about ESXi host system.
    - Please specify hostname or IP address of ESXi host system as C(hostname).
    - If hostname or IP address of vCenter is provided as C(hostname) and C(esxi_hostname) is not specified, then the
      module will throw an error.
    - VSAN facts added in 2.7 version.
    - SYSTEM fact uuid added in 2.10 version.
version_added: 2.5
author: