No effective code change: Fixwarnings, overrides, generics etc. (#1285)

src/main/java/io/ebeaninternal/server/expression/JunctionExpression.java

@@ -61,7 +61,7 @@ class JunctionExpression<T> implements SpiJunction<T>, SpiExpression, Expression
   }
 
   @Override
-  public boolean naturalKey(NaturalKeyQueryData data) {
+  public boolean naturalKey(NaturalKeyQueryData<?> data) {
     // can't use naturalKey cache
     return false;
   }