T1018: remove obsoleted 'dynamic' option from NTP

Increase NTP config version from 0 to 1. For more information see [1].

ntpd: Warning: the "dynamic" keyword has been obsoleted and will
be removed in the next release

[1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=553976

(cherry picked from commit 7a615ab169a7f6141fd9b6e84ac1ea415216d9bb)