Make parse tree locations exactly match

[amomchilov]

1. Base off this branch: Alex/print-all-wq-parser-locs

2. Run the tests:

   bazel test --config=dbg --test_output=errors //test:prism_location_tests >output.txt ; grep -B1 '^-.*"loc" :' output.txt | grep '"type" :' | sed 's/.*"type" : "\([^"]*\)".*/\1/' | sort | uniq -c | sort -nr

That'll print statistics of the most common WQ nodes with location issues. Start picking away at them :D

You can see the actual diffs in that output.txt