APM-2884 Set splunk flow callout response variable

Author: dominicplatt2-nhs

proxies/live/apiproxy/policies/AssignMessage.SetResponse203.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<AssignMessage async="false" continueOnError="false" enabled="true" name="AssignMessage.SetResponse203">
+    <DisplayName>AssignMessage.SetResponse203</DisplayName>
+    <Properties/>
+    <Set>
+        <StatusCode>203</StatusCode>
+        <AssignTo createNew="false" transport="https" type="response"/>
+    </Set>
+</AssignMessage>

proxies/live/apiproxy/proxies/default.xml

@@ -25,11 +25,14 @@
           <Condition>request.header.apikey = null or private.common.status-endpoint-api-key != request.header.apikey</Condition>
           <Name>RaiseFault.401Unauthorized</Name>
         </Step>
+      </Request>
+      <Response>
+        <Step>
+          <Name>AssignMessage.SetResponse203</Name>
+        </Step>
         <Step>
           <Name>FlowCallout.LogToSplunk</Name>
         </Step>
-      </Request>
-      <Response>
         <Step>
           <Name>AssignMessage.HandleSplunkHec</Name>
         </Step>
@@ -57,7 +60,7 @@
     <Condition>(proxy.pathsuffix MatchesPath "/_ping") and ((request.verb = "GET") or (request.verb = "HEAD"))</Condition>
   </RouteRule>
   <RouteRule name="NoRouteStatus">
-    <Condition>(proxy.pathsuffix MatchesPath "/_status") and ((request.verb = "GET") or (request.verb = "HEAD"))</Condition>
+    <Condition>(proxy.pathsuffix MatchesPath "/status") and (request.verb = "GET")</Condition>
   </RouteRule>
   <FaultRules>
     <FaultRule name="SplunkError">