Address sonar issues in ONAP-logging

Addressed the following sonar issues in ONAP-logging:
- use Map instead of ConcurrentHashMap
- remove unusued fields
- use Map.computeIfAbsent() instead of get()/put() pair
- readObject is unsafe
- use try-with-resources
- junit should assert something

Also removed some unused imports.

Issue-ID: POLICY-2305
Signed-off-by: Jim Hahn <jrh3@att.com>
Change-Id: I3480a55da4d0e771f8083c97770a6c9707d871f7
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/common-logging/src/test/java/org/onap/policy/common/logging/flexlogger/Logger4JTest.java b/common-logging/src/test/java/org/onap/policy/common/logging/flexlogger/Logger4JTest.java
index 99c343c0..d174aafc 100644
--- a/common-logging/src/test/java/org/onap/policy/common/logging/flexlogger/Logger4JTest.java
+++ b/common-logging/src/test/java/org/onap/policy/common/logging/flexlogger/Logger4JTest.java
@@ -21,6 +21,7 @@
 
 package org.onap.policy.common.logging.flexlogger;
 
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
@@ -41,7 +42,7 @@ public class Logger4JTest {
 
     @Test
     public void testLogger4JClassOfQ() {
-        new Logger4J(this.getClass());
+        assertThatCode(() -> new Logger4J(this.getClass())).doesNotThrowAnyException();
     }
 
     @Test