UR-2654 Dev - Fixed period membership.

[MILAN88888]

All Submissions:

• Have you followed the User Registration Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

https://themegrill.atlassian.net/browse/UR-2654

How to test the changes in this Pull Request:

1. Create a one-time membership with an expiration date

2. Verify whether the membership expires after the specified date.
3. If early renewal is enabled, renew the membership from My Account and verify that the expiration date updates correctly.
4. To test expiration, renewal reminders, and expiration-end emails, run the cron jobs and verify the emails.
   Before running, check:

• Membership Will Expire Soon period
• Membership Renewal Reminder Email period

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?
• Have you updated the documentation accordingly?

Changelog entry

UR-2654 Dev - Fixed period membership.