[master]Remove unnecessary "{" in description printing

Author: fan

Summary: Remove unnecessary "{" in description printing, also because there is no corresponding closing bracket.

Test Plan: Generate description and see if the problem is fixed

Reviewers: liyintang

Reviewed By: liyintang

CC: hbase-eng@

Differential Revision: https://phabricator.fb.com/D938508

Task ID: 2756340

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1516529 13f79535-47bb-0310-9956-ffa450edef68