You can use any version you like - OpenJDK or Oracle SE Java. It can be installed manually or using ansible roles like this: ...
$ ./ApacheTomcatScanner.py -h Apache Tomcat Scanner v3.4 - by Remi GASCOU (Podalirius) usage: ApacheTomcatScanner.py [-h] [-v] [--debug] [-C] [--show-cves ...