Shell should have default terminal width when detection fails
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                 Key: HBASE-2710
                 URL: https://issues.apache.org/jira/browse/HBASE-2710
             Project: HBase
          Issue Type: Bug
          Components: shell
    Affects Versions: 0.21.0
            Reporter: Todd Lipcon
            Assignee: Kannan Muthukkaruppan
             Fix For: 0.21.0


HBASE-2632 added code to detect terminal width. On some terminals (eg emacs 
shell) this returns 0, which resulted in infinite loops in the formatter. 
Should default to 100 when we can't detect width.

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