Fix typo in branding for XCP 1.6 docs

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #1043 from johnelse/docs-typo

Fix typo in branding for XCP 1.6 docs
CP-4320: Remove host-license-add from the CLI

Signed-off-by: John Else <john.else@citrix.com>
CP-4320: Update API lifecycle for Host.license_apply

Signed-off-by: John Else <john.else@citrix.com>
CP-4320: Remove implementation of Host.license_apply

Raise MESSAGE_REMOVED instead.

Signed-off-by: John Else <john.else@citrix.com>