Description of problem:
The inclusion of 'update-from-vip' is confusing in the doc example.

The 'update-from-vip' is only relevant when doing and update from OSP7.1 to 7.2 or greater.
Ref:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/7/html-single/Director_Installation_and_Usage/index.html#sect-Version_Specific_Notes

Version-Release number of selected component (if applicable):
https://access.redhat.com/documentation/en/red-hat-openstack-platform/8/single/upgrading-red-hat-openstack-platform/#sect-Updating_the_Overcloud

Actual results:
User read the documentation, and see an environment file with 'update' in its name and believe it is a requirement to include this during updates.

Because this is included, the update fails and leave the stack in "UPDATE_FAILED" state.

Expected results:
The OSP8 documentation should not have an example referencing an OSP7 specific environment file.

Additional info: