Setting 'create' to 'true' as it's generally wanted, but now the flag
exists so it can be skipped. I tested this locally with both options to
make sure it worked, and I copied the naming from influx1's chart, but
feel free to make changes as necessary.

While the PR has been open, the verion number got bumped forward, and I
needed to bump it again to clear lint. So I rebased and force-pushed my
branch to make it clear.

- [ ] CHANGELOG.md updated
- [ ] Rebased/mergable
- [ ] Tests pass
- [ ] Sign [CLA](https://influxdata.com/community/cla/) (if not already signed)