Merge pull request #800 from hapifhir/gg-202204-xver

fix problem with non-new data types on xver extensions

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/XVerExtensionManager.java

@@ -146,6 +146,7 @@ public class XVerExtensionManager {
   public void populateTypes(JsonObject path, ElementDefinition val, String verSource, String verTarget) {
     for (JsonElement i : path.getAsJsonArray("types")) {
       String s = i.getAsString();
+      if (!s.startsWith("!")) {
         if (s.contains("(")) {
           String t = s.substring(0, s.indexOf("("));
           TypeRefComponent tr = val.addType().setCode(translateDataType(verTarget, t));
@@ -168,6 +169,7 @@ public class XVerExtensionManager {
         }
       }
     }
+  }
 
   private boolean hasTargets(String dt) {
     return Utilities.existsInList(dt, "canonical", "Reference", "CodeableReference");