ECMS-6296: Update ECMS unit tests to adapt change from JCR-2307
ECMS-5998: Can't import intranet folder after deleting node "exo:actions"

Fix description:
- Property exo:actions is not mandatory
- Add new upgrade plugin
PLF-5974: Cannot start PLF with MySQL in UTF-8 (ecms)

Fix description:
- Add dialect to repository configuration
ECMS-6256: Incorrect sort by title using categoryList template in content list portlet

Fix description:
- In case of sorting taxonomy, use exo:name as sort creteria instead of exo:titlePublished
ECMS-6312: [Product] Redundant bullets in Document View

Fix description:
- Restore style of nav-tabs element to avoid regression
ECMS-6234 PropertyValueComparator class is duplicated in core service and in webui
Fix description: re-add PropertyValueComparator in core webui to use in platform.
ECMS-6258 | PDF not shown in the PDFViewer with specific creation date
Fix closing braces
Remove all unused imports
Merge branch 'stable/4.0.x' of https://github.com/exoplatform/ecms into fix/4.0.x/ECMS-6258
remove all unnecessary imports