Rename time_resolution_minutes to sample_period_minutes to make the code consistent

[RishiKumarRay]

Pull Request

Description

Rename time_resolution_minutes to sample_period_minutes to make the code consistent

Fixes #584

Checklist:

• [ x] My code follows OCF's coding style guidelines
• [ x] I have performed a self-review of my own code
• [ x] I have made corresponding changes to the documentation
• [ ]x I have added tests that prove my fix is effective or that my feature works
• [ x] I have checked my code and corrected any misspellings

[JackKelly]

@all-contributors please add @RishiKumarRay for code

[allcontributors[bot]]

@JackKelly

I've put up a pull request to add @RishiKumarRay! :tada: