Fix minor bug that prevented creating tokens with long validity period

Change-Id: I74ceb29c716628dcddff0c56990a72aa744c23c3

Author: ChristophEichhorn

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

@@ -44,7 +44,7 @@ public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchPr
         // "TRACE", "DEBUG", "INFO", "WARN", "ERROR"
         String level = "TRACE";
         // Set a validity period in days
-        int validityPeriodInDays = 2;
+        long validityPeriodInDays = 2;
         // If available provide Base64 encoded private key here:
         String privateKey = "";
         // If available provide Base64 encoded private key here: