HBase tableName is case sensitive, so remove htableName toUpperCase()

Description
HBase is case sensitive，tableName.toUpperCase() will lead to the created table could not be found.
If my tableName of HBase is lowercase, kylin can't find the table created in the HFile generated step.

Improvement
just remove toUpperCase() in CubeHFileJob for HBase tableName on master-hadoop3.1.