ENG-7208.  postlaunch script for collecting cluster statistics for 10 minutes.
Squashed commit of the following:

commit c6e5e65345af135ebadad15ff5f1a7ad6737c263
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Fri Dec 5 14:49:41 2014 -0500

    added license and fixed whitespace

commit f6b4e5f09a8600f7f18640e06f2abe01ad3be8af
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Fri Dec 5 13:58:45 2014 -0500

    updated script name and README.md

commit 230e710b3870ee551db39d274e0c54eca8080096
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Fri Dec 5 13:56:35 2014 -0500

    updated script name and README.md

commit a99f83d7a0e5c22c2f883c99adb9a157ad191be6
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Tue Nov 18 13:58:34 2014 -0500

    added README

commit 6fd6c68c7b04eedfa22b13136dfd3e180482e94e
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Tue Nov 18 13:56:40 2014 -0500

    added README

commit 0ccccb81297b60dfc98fb170b6d7a79618d08572
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Tue Nov 18 11:47:03 2014 -0500

    reworked checkvoltdbstatus

commit bf9cc6bcad3a08b8d13142eff4116bd4f52457b3
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Tue Nov 18 11:39:49 2014 -0500

    reworked argument checking

commit a2d384b54ec4249585d55cbb39d0665c08097663
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Tue Nov 18 11:10:34 2014 -0500

    updated parameters to mimic sqlcmd

commit 8032543b6aaa08e72d2c78ad81d0ef93d1698828
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Mon Nov 17 19:42:16 2014 -0500

    added user/password/port, send to voltdb message, sqlcmd test; updated @statistics argument

commit a63a3f56a4af1939093dfeacf2831f5d8b124b16
Author: pzhao-voltdb <pzhao@voltdb.com>
Date:   Mon Nov 17 13:24:20 2014 -0500

    postinstall checkup script