8171049: Era.getDisplayName doesn't work with non-IsoChronology
Reviewed-by: rriggs

8177678: Overstatement of universality of Era.getDisplayName() implementation
Reviewed-by: naoto

8054214: JapaneseEra.getDisplayName doesn't return names if it's an additional era
Reviewed-by: rriggs, naoto

8068278: ArrayIndexOutOfBoundsException instead of DateTimeException in j.t.chrono.JapaneseChronology.eraOf()
Summary: Corrected era range check
Reviewed-by: mchung, lancea

8054834: Modular Source Code
Reviewed-by: alanb, chegar, ihse, mduigou
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, jonathan.gibbons@oracle.com, karen.kinnear@oracle.com, magnus.ihse.bursie@oracle.com, mandy.chung@oracle.com, mark.reinhold@oracle.com, paul.sandoz@oracle.com