7133815: address the findbug errors in CachedRowSetImpl,  SerialStruct, BaseRow, SerialInputImpl, SerialOutputImpl
Reviewed-by: forax

Reviewed-by: smarks, chegar

Reviewed-by: alanb
Contributed-by: NPatrick Reinhart <patrick@reini.net>

Reviewed-by: dholmes

Reviewed-by: alanb, lancea, darcy

Reviewed-by: alanb

Reviewed-by: darcy

Reviewed-by: ohair

Reviewed-by: ohair

Reviewed-by: jjg, darcy, weijun

Reviewed-by: darcy, weijun