BYTEMAN-238. Make invalid field reference error tell you the class name.
Test case code for BYTEMAN-236

n.b. this test is not run from the test suite as the related issue has
not yet been resolved
Merge pull request #18 from doctau/BYTEMAN-238

BYTEMAN-238. Make invalid field reference error tell you the class name.
merge in James Livingston's patch for BYTEMAN-238