One very importent thing to check BEFORE you upgrade is the log file environment for your Operations Manager database, Please check the log size and the possibility to expand it along with the installation. Unfortunately is did cost me a couple of hours because of a Database where Autogrowth was disabled.
Beside the Error 26319 in the Operations Manager log you will also get an error with MPInfra_p_ManagementPackinstall in the setup log. This is done when the installation is importing the new Management pack,
Resolution – extend the size of your Operations Manager database log or Enable Autogrowth.