Ghatage opened a new pull request #2199: [documentation] Add doc for
decommissioning bookie process
URL: https://github.com/apache/bookkeeper/pull/2199
### Motivation
Documentation on how to decommission a bookie safely.
### Changes
Added `decommission.md`
Ghatage opened a new pull request #2199: [documentation] Add doc for
decommissioning bookie process
URL: https://github.com/apache/bookkeeper/pull/2199
### Motivation
Documentation on how to decommission a bookie safely.
### Changes
Added `decommission.md`