Use JDK 10 for 6.4 BWC builds (#32866)
Use JDK 10 for 6.4 BWC builds (#32866)

The 6.4 release will officially be built with JDK 10. We should push JDK
10 down to the BWC builds for the 6.4 branch then too.
vroyer/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra