Phoenix 180

First revision for review.  There are some open points here.  Still no test case added to consume the stats.  Will do the performance test once the system is available with me.
                if (table != null && table.getTimeStamp() < clientTimeStamp) {
                return table;
            }

Should the above condition be != in MetaDataEndpointImpl in doGetTable after we build the table that is from 0 to LATEST_TIMESTAMP?