improve unit test AccountStoreTest

Author: xiechang33

src/test/java/org/tron/core/db/AccountStoreTest.java

@@ -39,10 +39,9 @@ public static void init() {
     AccountStoreTest.put(data, accountCapsule);
   }
 
-
   @Test
   public void get() {
-    //test get Method
+    //test get and has Method
     Assert
         .assertEquals(ByteArray.toHexString(address), ByteArray
             .toHexString(AccountStoreTest.get(data).getInstance().getAddress().toByteArray()))