hostAlias to be added into values.yaml and into deployment.yaml

[miloslavkrisko]

The scenario is following:

You have a company which is hosting their own private LDAP which is not hosted behind any public DNS provider.
The ldap is using TLS so you need to use the DNS but the DNS is done within the company by editing the /etc/hosts files on the machines.

By adding an option to add hostAlias:{} and fill it from values.yaml the same way as annotation's are could help in this case.

This is just an idea what can be added and pretty easily supported.
How that syntax in .yaml file looks like:
` hostAliases:

  - hostnames:      
  
    - <DNS>
    
    ip: <privateIP>`