Fuel masters' ntp.conf contain settings for both Local Refclocks types

Existence of settings for both, Undisciplined Local Clock and Orphan Mode, can provide unstable ntp behavior.
For example unavailability of self-sync in case of isolated cluster:

~# ntpdate -d 192.168.1.5
19 Dec 18:32:09 ntpdate[8156]: ntpdate 4.2.6p3@1.2290-o Tue Jun 5 20:12:09 UTC 2012 (1)
Looking for host 192.168.1.5 and service ntp
host found : 192.168.1.5
transmit(192.168.1.5)
receive(192.168.1.5)
transmit(192.168.1.5)
receive(192.168.1.5)
transmit(192.168.1.5)
receive(192.168.1.5)
transmit(192.168.1.5)
receive(192.168.1.5)
transmit(192.168.1.5)
192.168.1.5: Server dropped: Server has gone too long without sync
server 192.168.1.5, port 123
stratum 7, precision -22, leap 00, trust 000
refid [192.168.1.5], delay 0.02605, dispersion 0.00005
transmitted 4, in filter 4
reference time: 00000000.00000000 Mon, Jan 1 1900 0:00:00.000
originate timestamp: d83eedb9.4138e3af Fri, Dec 19 2014 18:32:25.254
transmit timestamp: d83eedb9.40e33c69 Fri, Dec 19 2014 18:32:25.253
filter delay: 0.02614 0.02625 0.02605 0.02611
         0.00000 0.00000 0.00000 0.00000
filter offset: 0.000778 0.000722 0.000841 0.000815
         0.000000 0.000000 0.000000 0.000000
delay 0.02605, dispersion 0.00005
offset 0.000841

19 Dec 18:32:27 ntpdate[8156]: no server suitable for synchronization found