ACCUMULO-1361 committing Corey Nolet's for zero-length ColumnVisibility

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1477732 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1361 committing Corey Nolet's patch for zero-length ColumnVisibility

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1477733 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1335 commiting Corey Nolet's patch to add DiskUsage to the API

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ACCUMULO-1365 use the MAC mechanism for finding a random port

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1477782 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1365 use the MAC mechanism for finding a random port

git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1477783 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1321 update increasingly inaccurate comment

git-svn-id: https://svn.apache.org/repos/asf/accumulo/branches/1.5@1477790 13f79535-47bb-0310-9956-ffa450edef68
ACCUMULO-1321 update increasingly inaccurate comment

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