Fixing a few ColumType parsing / handling issues

1. the max value parsed from column schema response is not stored in the object and hence it is lost when the data is looked up from the cache.
2. isMultiValue method was incorrect in cases when min=1 and max>1

Change-Id: I93cb157b9e9cdded274bc957d90cde660003ba9e
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>