HIVE-22323 Fix Desc Table bugs

[miklosgergely]

DESC TABLE operation is having the following bugs:

• Whole table descs have two headers.
• Table column desc has incorrect long header, while the table is transposed having the headers in the first column.
• Json formatted data also has the headers.
• Json formatted data doesn't have the column statistics in it.
• There is no TestBeeLineDriver test for desc table, thus the actual output is not tested, just some intermediary.