material: fix sort id unit test failure

jme3-core/src/main/java/com/jme3/material/Technique.java

@@ -186,7 +186,7 @@ public final class Technique {
     public int getSortId() {
         int hash = 17;
         hash = hash * 23 + def.getSortId();
-       hash = hash * 23 + dynamicDefines.hashCode();
+        hash = hash * 23 + paramDefines.hashCode();
         return hash;
     }
 }