Make sure hmm clock_scale and freq are set or SICS won't start properly.

If these parameters aren't set on an instrument with a histogram server
then SICS won't create the hdb tree.

site_ansto/instrument/hipd/config/hmm/hmm_configuration.tcl

@@ -23,6 +23,8 @@ proc ::histogram_memory::init_OAT_TABLE {args} {
 
       set clock_scale 1000
       set freq 50
+      hmm configure fat_clock_scale $clock_scale
+      hmm configure fat_frame_frequency $freq
       hmm configure fat_frame_source INTERNAL
 
       switch $resolution {