Summary: Clean up doclint errors and warnings in classes in java.util
Reviewed-by: darcy, chegar
Contributed-by: NBrian Burkhalter <brian.burkhalter@oracle.com>

Reviewed-by: mchung, ahgross, forax, psandoz

Reviewed-by: dholmes, alanb

Reviewed-by: alanb

Reviewed-by: ahgross, alanb, dmeetry

Summary: Minor code changes to cleanup warnings in java.util.*
Reviewed-by: mduigou, naoto, smarks
Contributed-by: NRemi Forax <forax@univ-mlv.fr>

Reviewed-by: dholmes

Reviewed-by: darcy, lancea, alanb, briangoetz, mduigou, mchung

Reviewed-by: darcy, weijun