8169197: Improve error reporting for compiling against unexported package
Summary: When a type cannot be found, look into other modules, search for possible viable types, and report them conveniently to the user.
Reviewed-by: mcimadamore, jjg

8169074: Build is failing after JDK-8166538
Summary: Reverting d3dde3f775b8
Reviewed-by: darcy

8166538: Improve error reporting for compiling against unexported package
Summary: When a type cannot be found, look into other modules, search for possible viable types, and report them conveniently to the user.
Reviewed-by: mcimadamore, jjg

8162546: change hidden options -Xdebug to --debug, -XshouldStop to --should-stop, and -diags to --diags
Reviewed-by: mcimadamore

8161019: javac, fold formatter options
Reviewed-by: mcimadamore, jjg

6971882: Remove -XDstdout from javac test
Reviewed-by: darcy

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