Fix sonar issue AppExitHandler

Issue-ID: AAF-1118
Signed-off-by: Edyta Krukowska <edyta.krukowska@nokia.com>
Change-Id: I9ed1b206dd0f8130aee11d453f1cdd6eaa534a58
diff --git a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java
index caeca37..0bb983e 100644
--- a/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java
+++ b/certServiceClient/src/main/java/org/onap/aaf/certservice/client/AppExitHandler.java
@@ -26,8 +26,8 @@
     private static final Logger LOGGER = LoggerFactory.getLogger(AppExitHandler.class);
 
     public void exit(ExitStatus exitStatus) {
-        LOGGER.info(String.format("Application exits with following exit code: %s and message: %s",
-                exitStatus.getExitCodeValue(), exitStatus.getMessage()));
+        LOGGER.info("Application exits with following exit code: {} and message: {}",
+                exitStatus.getExitCodeValue(), exitStatus.getMessage());
         System.exit(exitStatus.getExitCodeValue());
     }
 }