Move to Java 17 on CI

[MichaelHamann]

@vmassol

• 'tomcat' : [ 'latest' : '9-jdk11', 'lts' : '9-jdk11', 'special' : '9-jdk8' ] → 'tomcat' : [ 'latest' : '9-jdk17', 'lts' : '9-jdk17', 'special' : '9-jdk8' ]

Do you mean 9-jdk11 instead of 9-jdk8 for special? Because I think with JDK 8, the tests are all failing, at least they did when I saw them recently.