Relative imports reverted

[jonathan-recordedfuture]

Describe the bug
Why was relative imports reverted here
#613

[Ickerday]

Hi, I can't answer that for the previous maintainers. It's not a priority for us to begin using them at this point in time.

[jonathan-recordedfuture]

@Ickerday It's a small patch. Would you accept a PR if I take a look at this?

See my prior patch.
https://github.com/splunk/splunk-sdk-python/pull/602/changes