Fix storage.parent multiple parents found error

Since datastores can live in multiple datacenters and map to a single
storage record they belong to multiple datacenter/datastoreFolder
folders.  This leads to multiple parents found errors when doing
storage.parent.

app/models/manageiq/providers/vmware/infra_manager/refresh_parser.rb

@@ -1245,7 +1245,10 @@ def self.folder_inv_to_hashes(inv, result, result_uids)
         inv.each do |mor, data|
           mor = data['MOR'] # Use the MOR directly from the data since the mor as a key may be corrupt
 
-          child_mors = get_mors(data, 'childEntity')
+          # Since datastores living in multiple datacenters map to a single Storage record
+          # the same record will live in multiple folders.  This leads to Multiple parents found
+          # exceptions if we allow datastores to be in child_uids.
+          child_mors = get_mors(data, 'childEntity').reject { |child| child.vimType == "Datastore" }
 
           new_result = {
             :type        => EmsFolder.name,

app/models/manageiq/providers/vmware/inventory/persister/definitions/infra_collections.rb

@@ -220,7 +220,7 @@ def relationship_save_block(relationship_key, relationship_type, parent_type)
         child_recs.each do |model_class, children_by_id|
           children_by_id.each_value do |child|
             new_parent_klass, new_parent_id = parent_by_child[model_class][child.id]
-            prev_parent = child.with_relationship_type(relationship_type) { child.parent(:of_type => parent_type) }
+            prev_parent = child.with_relationship_type(relationship_type) { child.parents(:of_type => parent_type)&.first }
 
             next if prev_parent && (prev_parent.class.base_class == new_parent_klass && prev_parent.id == new_parent_id)