8145990: Move sun.misc math support classes to jdk.internal.math
Reviewed-by: bpb, darcy

8039915: Wrong NumberFormat.format() HALF_UP rounding when last digit exactly at rounding position greater than 5
Summary: Fixes erroneous rounding in DigitList for corner cases uncovered previously. Adds dedicated unit tests to TieRoundingTest
Reviewed-by: bpb, darcy
Contributed-by: Olivier Lagneau <olivier.lagneau@oracle.com>

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