Change log level to avoid errors during app-start w.o. key

Change-Id: Iab96990b1b5754c82cbfa3bd96527f02a15c7579

Author: ChristophEichhorn

cf-java-logging-support-servlet/src/main/java/com/sap/hcp/cf/logging/servlet/dynlog/PublicKeyReader.java

@@ -22,7 +22,7 @@ public RSAPublicKey readPublicKey(Environment environment) throws IOException, N
         String pemKey = environment.getVariable("DYN_LOG_LEVEL_KEY");
 
         if (pemKey == null) {
-            LOGGER.error("DYN_LOG_LEVEL_KEY not found in environment");
+            LOGGER.info("DYN_LOG_LEVEL_KEY not found in environment");
             return null;
         } else {
             pemKey = pemKey.replace("-----BEGIN PUBLIC KEY-----", "");