python-influxdb-5.0.0-bp151.1.1

- convert to singlespec

- spec file
  + "hostname" build dependency only for Leap 15 and above

- update to 5.0.0
  for detailed change log, see https://github.com/influxdata/influxdb-python/commits/b59fe97
- add "hostname" build dependency

- remove unnecessary build requires

- Initial packaging (4.0.0)