Image courtesy of Disney Animation   Today, Disney is celebrating the digital release of OLAF’S FROZEN ADVENTURE starring the voice cast of Josh Gad, Idina Menzel, Kristen Bell and Jonathan Groff. The digital copy of Olaf’s Frozen Adventure will also add six classic Disney shorts to your holiday digital collection.      In Walt Disney Animation Studios’ 21-minute featurette “Olaf’s Frozen Adventure,” Olaf (voice of Josh Gad) teams up with Sven on a merry mission. It’s the first holiday season since the gates reopened and Anna (voice of Kristen Bell) and Elsa (voice of Idina Menzel) host a celebration for all of Arendelle. When the townspeople unexpectedly leave early to…