Merge
8177511: Remove the old standard docletReviewed-by: jjg
8076543: Add @modules as needed to the langtools testsReviewed-by: jjg, shurailine
8004834: Add doclint support into javadocReviewed-by: darcy
8002168: Cleanup initialization of javadoc MessagerReviewed-by: darcy
6958836: javadoc should support -Xmaxerrs and -XmaxwarnsReviewed-by: darcy