Output link to yaml file

This is clickable in intellij. But for those who aren't in intellij
also print out the real path
Include line number in output file
output expected file path for rules test
Added path to .sql file too
Extracted util method
include suffix in real path output
It's RulesTest, not yaml
Check for null filenames
Made printClickableFilename more robust

You probably care more about the test failing than writing out the
filename.
Revert "Made printClickableFilename more robust"

This reverts commit 39dfa9311ba4c1eb470384540a516feeb7f8f6b3.
merge ScottDugas: Output yaml path

Merge pull request #1399 from ScottDugas/sql-layer/output-yaml-path
https://github.com/FoundationDB/sql-layer/pull/1399