8130051: Cleanup usage of reflection in jaxp
Summary: replaced usage of reflection with direct access where possible, removed obsolete code where possible.
Reviewed-by: joehw

8129956: jaxp: CodeSource.getLocation() might return null
Reviewed-by: lancea

8129880: Cleanup usage of Class.getResource in jaxp
Reviewed-by: joehw, mchung

8129572: Cleanup usage of getResourceAsStream in jaxp
Reviewed-by: alanb, joehw, mchung, redestad

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