Log Message:
Update ruby21-base and ruby21 packages to 2.1.6.

From release announce:

Ruby 2.1.6 has been released.

This release includes a security fix for OpenSSL extension. Please view the
topic below for more details.

    CVE-2015-1855: Ruby OpenSSL Hostname Verification

And, many bug fixes are also included. See tickets and ChangeLog for details.