* Update samples for nodejs + nodejs-google-cloud-functions.
* Fix example generator to use deterministic randomness.
This avoids changing results after each generation, and makes diff reviews easier.
* Update NodeJS samples.
This is the last "randomness" update. From now on the samples should only change if either the generator, the input or parameters change.
* Improved ExampleGenerator:
- Now takes into account enum and uri/url formats for strings.
- Uses example for referenced objects if available.
- Proper examples get generated for specific numeric formats, because more specific formats now get checked before generic format.
- Honors min and max values for numerical properties, if set.
* Ran script `bin/nodejs-petstore-server.sh`.
* Renamed log to logger to conform to coding standard.
