Fixes #515

Made DS8s 1 per Roster as per Designer's Commentary

T'au Empire.cat

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<catalogue id="7ac4-f90b-e0a6-ae72" name="T&apos;au Empire" revision="21" battleScribeVersion="2.03" authorUrl="https://battlescribedata.appspot.com/#/repo/wh40k-killteam" library="false" gameSystemId="a467-5f42-d24c-6e5b" gameSystemRevision="39" xmlns="http://www.battlescribe.net/schema/catalogueSchema">
+<catalogue id="7ac4-f90b-e0a6-ae72" name="T&apos;au Empire" revision="22" battleScribeVersion="2.03" authorUrl="https://battlescribedata.appspot.com/#/repo/wh40k-killteam" library="false" gameSystemId="a467-5f42-d24c-6e5b" gameSystemRevision="40" xmlns="http://www.battlescribe.net/schema/catalogueSchema">
   <categoryEntries>
     <categoryEntry id="580b-8df1-70dc-452b" name="Drone" hidden="false"/>
     <categoryEntry id="fd6f-ea1b-53af-11ab" name="Battlesuit" hidden="false"/>
@@ -660,6 +660,7 @@
     <selectionEntry id="c326-255b-59ee-42b8" name="DS8 Tactical Support Turret" hidden="false" collective="false" import="true" type="model">
       <constraints>
         <constraint field="selections" scope="parent" value="1.0" percentValue="false" shared="true" includeChildSelections="false" includeChildForces="false" id="4989-0887-2311-b4bb" type="max"/>
+        <constraint field="selections" scope="roster" value="1.0" percentValue="false" shared="true" includeChildSelections="true" includeChildForces="false" id="dbf1-b394-b374-81b1" type="max"/>
       </constraints>
       <profiles>
         <profile id="df9c-434b-a7b4-a629" name="DS8 Tactical Support Turret" hidden="false" typeId="bb0a-aba1-abd0-beb3" typeName="Model">