[HBASE-9828] Fix the Reflection call to get a DFSInputStream.

Author: manukranthk

Summary: The Reflection call to get a DFSInputStream when applied in the local file system case, causes problems since the corresponding method is private here.

Test Plan: Tested on Local HBase Single node setup.

Reviewers: pritam

Reviewed By: pritam

CC: hbase-eng@, san

Differential Revision: https://phabricator.fb.com/D1023902

Task ID: 3043496

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.89-fb@1535477 13f79535-47bb-0310-9956-ffa450edef68