anyone know why java 8 now seems to be required by our jenkins maven builds?

[Marshall Schor]

Both Ducc and UIMA-SDK builds got a failure using maven 3.3.9 - did that get
compiled with Java 8 (and now won't run with java 7)? or something else? 

Workaround - seems to be to configure Jenkins to use Java 1.8 (latest).

-Marshall