Fix issue with global substitutions

Check if node types in the global substitutions file already exist before attempting to create them

Signed-off-by: MichaelMorris <michael.morris@est.tech>
Issue-ID: SDC-3533
Change-Id: I8129e3108e27f3bae4f33e1bd652d8b74ae34de9
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ResourceBusinessLogic.java b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ResourceBusinessLogic.java
index fa58e61..c8162d7 100644
--- a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ResourceBusinessLogic.java
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ResourceBusinessLogic.java
@@ -1875,7 +1875,7 @@
                                  String nodeName) {
         try {
             for (Entry<String, NodeTypeInfo> nodeTypeEntry : nodeTypesInfo.entrySet()) {
-                if (nodeTypeEntry.getValue().isNested()) {
+                if (nodeTypeEntry.getValue().isNested() && !nodeTypeAlreadyExists(nodeTypeEntry.getKey())) {
                     handleNestedVfc(resource, nodeTypesArtifactsToHandle, nodeTypesNewCreatedArtifacts, nodeTypesInfo, csarInfo,
                         nodeTypeEntry.getKey());
                     log.trace("************* finished to create node {}", nodeTypeEntry.getKey());
@@ -1902,6 +1902,10 @@
             throw e;
         }
     }
+    
+    private boolean nodeTypeAlreadyExists(final String toscaResourceName) {
+        return toscaOperationFacade.getLatestByToscaResourceName(toscaResourceName).isLeft();
+    }
 
     private Either<Resource, ResponseFormat> handleVfCsarArtifacts(Resource resource, CsarInfo csarInfo, List<ArtifactDefinition> createdArtifacts,
                                                                    ArtifactOperationInfo artifactOperation, boolean shouldLock,