Jobslib

Fixed
- liveness consul key env name

Fixed
- version of the `colored` dependency

Added
- `tox` configuration (DOP-3793)
- Simple influxdb metrisc backend (DOP-3793)
Changed
- use `json` serializer from stdlib (DOP-3793)
Removed
- Seznam.cz specific things (DOP-3793)

Fixed
- Do not exit with code 0 when error (SDOP-1363)

Added
- consul timeout (DOP-3335)

Changed
- limit `ujson` dependency