Refactor getObjectValue usage

[`YamlOperator.getObjectValue`](https://sam.gleske.net/jervis-api/2.0/net/gleske/jervis/tools/YamlOperator.html#getObjectValue(java.util.Map,%20java.lang.String,%20java.lang.Object)) features are more robust.  Most getObjectValue usage pre-dates the new features and there's a lot of processing code which can be removed because the new version of getObjectValue handles it automatically.