Validate all container host OSes against Virtual hardware version 13

[tusharnt]

Validate all container host OSes against Virtual Hardware version 13 and update customer facing documentation.
Fix VCP issues uncovered if any.

[divyenpatel]

Here is my observations.

VM version 13

• New VM created from ISO - product_serial and product_uuid does not match.
• New VM created from OVA - product_serial and product_uuid does match.

VM version 11

• New VM created from ISO -product_serial and product_uuid does match.
• New VM created from OVA - product_serial and product_uuid does match.

CC: @SandeepPissay

[SandeepPissay]

As we discussed, let us use product_serial in the OS and use that for discovering the node. Since this always matches the VM's uuid in VC inventory, the discovery will be successful.

[prashima]

This needs to be cherry-picked to 1.9.

[abrarshivani]

Cherrypicked to 1.9 here

[abrarshivani]

Documentation PR and Cherrypick PR is merged. The fix is available in k8s v1.9.4