ENG-5842 Fix voltify from debian and rpm packages.

Note that all the complexity in toolrunner.py is getting voltify (and other voltcli-based scripts) to use ~/.voltdb/<scriptname> for logs and for the virtual environment to avoid permission problems if the script is run directly from /usr/share/voltdb/tools. I tested this on ubuntu (12.10) and centos (6.5). I also briefly ran voltadmin/voltdb to check for breakage. 

Also note that it now performs a version check with the virtual environment so that it gets rebuilt whenever the voltdb version changes.