Change the PuppetDB port in Puppet Enterprise 2015.2.x, 2016.1.x, and 2017.2.x

I have a conflict on port 8081. How do I change the port that PuppetDB uses? Version and installation information PE version: 2015.2.x (monolithic and split), 2016.1.x (monolithic), 2017.2.x View i...