* Fix unvalidated path warning in cirfile.go
* Adding test
* move dir path vars into global scope, set wave home in test if not set already
* separate validation code into own testable func
* do removal of cir file in cleanup
* rename test file names
* flock should return err if waiting without done fn
* update comment
* use timeout context
* remove redundant validation
* add more error messages
* use filepath.join instead
* validate when creating cirfile too
* support .ptyout.cf, etc.
* remove validation as cirfile is "trusted", since it only accepts pre-validated input
* revert to passing nil context for flock in the Create file case
