8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8049367: Modular Run-Time Images
Reviewed-by: jlahoda, ksrini
Contributed-by: alan.bateman@oracle.com, alex.buckley@oracle.com, bradford.wetmore@oracle.com, chris.hegarty@oracle.com, erik.joelsson@oracle.com, james.laskey@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, sundararajan.athijegannathan@oracle.com

8038730: Clean up the way JavadocTester is invoked, and checks for errors.
Reviewed-by: ksrini, sogoel, bpatel

8040903: Clean up use of BUG_ID in javadoc tests
Reviewed-by: ksrini

8041150: Avoid silly use of static methods in JavadocTester
Reviewed-by: ksrini

8027977: javadoc dies on NumberFormat/DateFormat subclass
Reviewed-by: jjg