Updated RollingLogFile.EXPIRATION_TIME.

The RollingLogFile.EXPIRATION_TIME has been changed to 0 such that
log expiration is disabled in case the log.instance.*.expirationTime
parameter is missing from the CS.cfg.

https://pagure.io/dogtagpki/issue/2656

Change-Id: I8c8c7a1560f986920244f9660b0de10e197f93b4

base/server/cms/src/com/netscape/cms/logging/RollingLogFile.java

@@ -66,7 +66,7 @@ public class RollingLogFile extends LogFile {
     /**
      * The default expiration time in seconds
      */
-    static final String EXPIRATION_TIME = "2592000";
+    static final String EXPIRATION_TIME = "0";
 
     /**
      * The maximum file size in bytes