NPA-3627 Revert Sandbox Changes

Author: JackPlowman

proxies/sandbox/apiproxy/policies/AssignMessage.AddIssuerHeader.xml

@@ -1,7 +1,7 @@
 <AssignMessage async="false" continueOnError="false" enabled="true" name="AssignMessage.AddIssuerHeader">
   <Add>
       <Headers>
-          <Header name="NHSD-Identity-IdP">{jwt.DecodeJWT.accesstoken.id_token}</Header>
+          <Header name="NHSD-Identity-IdP">{jwt.DecodeJWT.FromJWTHeader.claim.issuer}</Header>
       </Headers>
   </Add>
   <IgnoreUnresolvedVariables>false</IgnoreUnresolvedVariables>

proxies/sandbox/apiproxy/policies/AssignMessage.AddUserIdHeader.xml

@@ -0,0 +1,9 @@
+<AssignMessage async="false" continueOnError="false" enabled="true" name="AssignMessage.AddUserIdHeader">
+  <Add>
+      <Headers>
+          <Header name="NHSD-Identity-UUID">{jwt.DecodeJWT.FromJWTHeader.claim.subject}</Header>
+      </Headers>
+  </Add>
+  <IgnoreUnresolvedVariables>false</IgnoreUnresolvedVariables>
+  <AssignTo createNew="false" transport="http" type="request"/>
+</AssignMessage>