MFH: r435585

russian/wordpress: Update from 4.7.2 to 4.7.3

Changelog: https://wordpress.org/news/2017/03/wordpress-4-7-3-security-and-maintenance-release/

This update fixes 6 security issues.

PR: 217598
Submitted by: Mikhail Timofeev (maintainer)

Approved by: ports-secteam (junovitch)