Update TOPAZ entry in Facilities.xml

Update the "livedata" tag in the TOPAZ entry of Facilities.xml to point
at the actual server running event_catcher (instead of my office
workstation).

Refs #11315

Code/Mantid/instrument/Facilities.xml

@@ -409,10 +409,7 @@
    <instrument name="TOPAZ" beamline="12"> 
 	<technique>Neutron Diffraction</technique>
     <technique>Single Crystal Diffraction</technique>
-    <livedata listener="TOPAZLiveEventDataListener" address="160.91.210.45:9100" />
-    <!-- HACK: The address needs to be changed to the proper value.  For now, it's
-         set to my office workstation which is running event_generator in addition
-         to event_catcher. -->
+    <livedata listener="TOPAZLiveEventDataListener" address="128.219.164.132:9000" />
     <!-- Act like we're ISawEV talking to event_catcher -->
    </instrument>