[INFINITY-2236] Verify Kafka upgrade instructions from 1.1.26-beta  (#1529)
[INFINITY-2236] Verify Kafka upgrade instructions from 1.1.26-beta  (#1529)

* [WIP] Verify Kafka upgrade instructions from 1.1.26-beta to release

This needs to be verified manually to ensure all these instructions are up to date and correct.

* Upgrade from 1.1.26 beta-to 1.1.27-beta (upgradesFrom is available only between these two at this moment)

* Suzanne's edits

* Specify DC/OS 1.10 in the doc

mesosphere/dcos-commons,mesosphere/dcos-commons,vishnu2kmohan/dcos-commons,mesosphere/dcos-commons,mesosphere/dcos-commons,vishnu2kmohan/dcos-commons,vishnu2kmohan/dcos-commons,vishnu2kmohan/dcos-commons,mesosphere/dcos-commons,vishnu2kmohan/dcos-commons