Fix problem with creation of the forwarded ticket

Following commit f44d455 the daemon is no longer
able to set {uid,gid} on the created file with the forwarded ticket. This patch
completes the previous one by removing the attempt to change {uid,gid}. The file
will be pwn by the daemon owner with permissions 0600.

src/XrdSeckrb5/XrdSecProtocolkrb5.cc

@@ -830,8 +830,6 @@ int XrdSecProtocolkrb5::exp_krbTkn(XrdSecCredentials *cred, XrdOucErrInfo *erp)
 
 // Change permission and ownership of the file
 //
-    if (chown(ccfile, pw->pw_uid, pw->pw_gid) == -1)
-       return Fatal(erp, errno, "Unable to change file ownership;", ccfile, 0);
     if (chmod(ccfile, 0600) == -1)
        return Fatal(erp, errno, "Unable to change file permissions;", ccfile, 0);