Fix StackoverflowError in Studio Server when starting sync workflow

Fixed a bug that caused a StackoverflowError in the Studio Server when a synchronization workflow was started for content with illegal cyclic master link structures.

(CMS-19119)

Fixed Taxonomy Renaming

Fixed problem that taxonomy documents have not been renamed on change according to their value property.

(CMS-18987)

Made TaxonomyResource Bean a Singleton

The TaxonomyResource bean was configured to be a prototype. It is now a singleton bean.

(CMS-18570)