RFR: 8156694 javap should render annotations in a friendly way

[Jonathan Gibbons]

Please review a relatively simple fix for javap to write disassembled 
annotations in a reasonably
friendly form, resolving constant pool indices.

Alternate layouts were attempted, including a more javap-traditional way 
of left-right side-by-side printing,
but the difficulty of handling potentially complex annotations made this 
more trouble than it was worth.
So for now, it's a simple, easy layout, as illustrated in the new test. 
One other test was affected by the new
information, and has been updated appropriately.

-- Jon

JBS: https://bugs.openjdk.java.net/browse/JDK-8156694
Webrev: http://cr.openjdk.java.net/~jjg/8156694/webrev.00/index.html