ACCUMULO-984 Prevent unexpected behavior when using a really small timeout values, that get truncated to zero on conversion internally.
ACCUMULO-955 Removed the minimum value for maxMemory, and accept any non-negative value.


git-svn-id: https://svn.apache.org/repos/asf/accumulo/trunk@1438248 13f79535-47bb-0310-9956-ffa450edef68