According to the Nova documentation[1], valid tpm_model properties
are: tpm-tis and tpm-crb, not TIS and CRB. This patch fixes the
misalignment and also adds missing tpm_version property.
[1]https://docs.openstack.org/nova/latest/admin/emulated-tpm.html
Closes-Bug: #2106223
Change-Id: I698dbd2946555c0a6455b1be17a6bf4a8d407ee7
(cherry picked from commit df5f2b3c86)