hbase-rpc-client sometimes fails getting region info

client.prototype._parseRegionInfo sometimes crashes because it gets the row of the meta table containing table:state instead of the one containing info:regioninfo. I worked around this by inserting
```
if(res.cols['info:regioninfo'] === undefined)
return undefined;
```
before
```
regionInfo = res.cols['info:regioninfo'].value;
```
although I don't understand the code (or node!) well enough to know if that is correct or optimal. Does that look right?
Thanks,
Mike

Start at client.prototype._parseRegionInfo and trace how rows from the HBase meta table are handled when info:regioninfo is absent. Reproduce the table:state case and verify that region-info parsing no longer crashes while valid region metadata continues to work; no test file is named in the issue.

Written by the indexing model from the issue text.