Update safe_load calls to work with psych 3/4

Part of ManageIQ/manageiq#22696

Keep compatibility with psych 3.1+ since permitted_classes and aliases were
added as keyword arguments to safe_load.

Note, psych 4 changed the interface to drop support with positional arguments for the permitted_classes.
Now, we must explicitly specify them using kwargs.

app/models/manageiq/providers/openstack/cloud_manager/orchestration_template.rb

@@ -105,7 +105,7 @@ def self.display_name(number = 1)
 
   def parse
     return JSON.parse(content) if format == 'json'
-    YAML.safe_load(content, [Date])
+    YAML.safe_load(content, :permitted_classes => [Date])
   end
 
   def validate_format_yaml