Increase junit coverage in ONAP-logging

Added some junit tests to increase coverage of ONAP-logger.
Many classes still need test cases.

Also fixed some sonar issues:
Returned interface instead of ConcurrentHashMap.
Used EnumMap instead of HashMap.
Used StringBuilder instead of StringBuffer.
Replaced literals with constants.
Replaced enum1.toString().equals(enum2.toString()) with enum1 == enum2

Updated license dates.
Updated another license date.

Change-Id: I777b6a913d7d03187a29dfeb817800b386ee23aa
Issue-ID: POLICY-582
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/common-logging/src/main/java/org/onap/policy/common/logging/eelf/DroolsPDPMDCInfo.java b/common-logging/src/main/java/org/onap/policy/common/logging/eelf/DroolsPDPMDCInfo.java
index c1e99822..ae4cc929 100644
--- a/common-logging/src/main/java/org/onap/policy/common/logging/eelf/DroolsPDPMDCInfo.java
+++ b/common-logging/src/main/java/org/onap/policy/common/logging/eelf/DroolsPDPMDCInfo.java
@@ -1,8 +1,8 @@
-/*-
+/*
  * ============LICENSE_START=======================================================
  * ONAP-Logging
  * ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@
 package org.onap.policy.common.logging.eelf;
 
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 
 public class DroolsPDPMDCInfo implements MDCInfo {
 
@@ -43,7 +44,7 @@ public class DroolsPDPMDCInfo implements MDCInfo {
      * @return the instance of ConcurrentHashMap
      */
     @Override
-    public ConcurrentHashMap<String, String> getMDCInfo() {
+    public ConcurrentMap<String, String> getMDCInfo() {
         return mdcMap;
     }
 }