[Mondrian] Mondrian 4 on Tomcat 8

[Tom Barber(Alabs)]

Alright chaps,

I was hoping someone can explain this randomness on Tomcat 8:

Caused by: java.lang.NoClassDefFoundError: mondrian/olap/LevelType
     at 
mondrian.olap4j.MondrianOlap4jConnection.toOlap4j(MondrianOlap4jConnection.java:604)
     at 
mondrian.olap4j.MondrianOlap4jHierarchy.getLevels(MondrianOlap4jHierarchy.java:69)
     at org.saiku.query.QueryHierarchy.<init>(QueryHierarchy.java:57)
     at org.saiku.query.Query.<init>(Query.java:88)


It's been doing my head in all morning, and when I run the same War in 
Tomcat 6 it runs fine, but I know that package hasn't existed in 
Mondrian 4 for months and I find no mention of it in Saiku, Mondrian, 
Olap4j etc

So what on earth is Tomcat up to?

Thanks

Tom