Improve naming of anonymous/class-in-function Modules (bp #1224) (#1249)

* Better anonymous and class-in-function desiredName

This changes the desired name of a Module to provide non-numeric
naming for anonymous Modules and Modules defined inside function
bodies.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
(cherry picked from commit a69d79f2

)

* Tests for anonymous/class-in-module desiredName

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
(cherry picked from commit 77d2455a)