Improve existing host selector
------------------------------

                 Key: CHUKWA-219
                 URL: https://issues.apache.org/jira/browse/CHUKWA-219
             Project: Hadoop Chukwa
          Issue Type: Improvement
          Components: User Interface
         Environment: Redhat EL 5.1, Java 6
            Reporter: Eric Yang


Use case: user wants to select the following machines out of a cluster of 500 
machines.
    * host1.example.com
    * host2.example.com
    * host3.example.com
    * host4.example.com

One possible implementation is to provide a text field or text area for user to 
enter (or copy / paste) a list of
machine names.

In addition, glob like support is useful as well



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