Refactor TableModState to use nanoTime refactor (#1720)

* #1719 - Refactor TableModState to use nanoTime

* Tests only - reduce logging

src/main/java/io/ebeaninternal/server/transaction/NoTransaction.java

@@ -46,9 +46,9 @@ class NoTransaction implements SpiTransaction {
   }
 
   @Override
-  public long getStartMillis() {
+  public long getStartNanoTime() {
     // not used
-    return System.currentTimeMillis();
+    return System.nanoTime();
   }
 
   @Override