Don't poll histogram server for textstatus in simulation and script validator mode.

site_ansto/instrument/config/hmm/hmm_configuration_common_1.tcl

@@ -1782,9 +1782,15 @@ Publish SAT_TABLE user
   # Make controller for histmem textstatus. Used by hmstat proc
   set host [dict get $::HISTMEM_HOSTPORT HMSTAT HOST]
   set port [dict get $::HISTMEM_HOSTPORT HMSTAT PORT]
+  if {$::histogram_memory::histmem_simulation == "false"} {
   MakeSctController sct_hmm astvelsel $host:$port
+  }
 
   proc ::histogram_memory::hmstat {args} {
+    variable histmem_simulation
+    if {$histmem_simulation == "true"} {
+      return
+    }
     set startIndex -1
     # Try three times to get at least some data following the HTTP header.
     # Usually we get all the data but sometimes we just get the header.
@@ -1838,7 +1844,10 @@ Publish SAT_TABLE user
     }
   }
   # Poll to keep HTTP connection alive
+  if {$::histogram_memory::histmem_simulation == "false"} {
   sicspoll add ::histogram_memory::hmstat script 30 ::histogram_memory::hmstat
+  }
+
 
 namespace eval ::histogram_memory {
 #TODO Create GumTree commands to setup, start and stop the histmem