Allow to specify time when creates a mapping event instance

Change-Id: Id4d9583a8d43d8a6e0913393d35a222b9688b0d2
diff --git a/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/DefaultMappingEntryTest.java b/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/DefaultMappingEntryTest.java
index 47aadbe..f3cbde4 100644
--- a/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/DefaultMappingEntryTest.java
+++ b/apps/mappingmanagement/api/src/test/java/org/onosproject/mapping/DefaultMappingEntryTest.java
@@ -32,6 +32,10 @@
     private static final MappingValue MAPPING_VALUE =
                          new MappingTestMocks.MockMappingValue();
 
+    private final MappingEntry entry1 = makeMappingEntry(1);
+    private final MappingEntry sameAsEntry1 = makeMappingEntry(1);
+    private final MappingEntry entry2 = makeMappingEntry(2);
+
     /**
      * Creates a new mapping entry from an unique value.
      *
@@ -50,10 +54,6 @@
         return new DefaultMappingEntry(mapping, MappingEntry.MappingEntryState.ADDED);
     }
 
-    final MappingEntry entry1 = makeMappingEntry(1);
-    final MappingEntry sameAsEntry1 = makeMappingEntry(1);
-    final MappingEntry entry2 = makeMappingEntry(2);
-
     /**
      * Tests the equals, hashCode and toString methods using Guava EqualsTester.
      */