Fixed creation process of VulnDescription entity; controller and template refinements.
Renamed History Entity Mapping to Mod Entity Mapping
Rearranged mod_entity_mapping configuration file setup. Started with dynamic processing of log page structure; include some trials in VulnerabilityController, getters in EntityVersion service, Hierarchy and ChildObject handling in ModContextProvider. Changed label structure of VulnDescription Entity in Type, Twig Template and Translation file. Started the ShowHistory twig template.