Faas-supervisor

**Full Changelog**: https://github.com/grycap/faas-supervisor/compare/1.5.7-beta1...1.5.7-beta2

What's Changed

**Full Changelog**: https://github.com/grycap/faas-supervisor/compare/1.5.6-beta3...1.5.7-beta1

What's Changed
* Report coverage by micafer in https://github.com/grycap/faas-supervisor/pull/61
* Fix style by micafer in https://github.com/grycap/faas-supervisor/pull/62
* Fix style by micafer in https://github.com/grycap/faas-supervisor/pull/63
* Fixes on api gateway event parsing by catttam in https://github.com/grycap/faas-supervisor/pull/65
* Environment variable to choose if download input files by catttam in https://github.com/grycap/faas-supervisor/pull/67


**Full Changelog**: https://github.com/grycap/faas-supervisor/compare/1.5.5...1.5.6

**Full Changelog**: https://github.com/grycap/faas-supervisor/compare/1.5.6-beta...1.5.6-beta2