8180003: Remove sys/ prefix from poll.h and signal.h includes
Reviewed-by: dholmes, bpb

8170663: Fix minor issues in corelib and servicabilty coding.
Reviewed-by: dsamersoff, dholmes
Contributed-by: David CARLIER <devnexen@gmail.com>, goetz.lindenmaier@sap.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