Revert "ECMS-4374 CLONE - Investigate ECMS performance on community website- Remove the usage of download server as much as possible, use DownloadConnector instead."

This reverts commit de8df98c9a621263c0d306ca68fde2ed647b9a93.

Conflicts:
	core/webui/src/main/java/org/exoplatform/ecm/webui/utils/Utils.java
	core/webui/src/main/java/org/exoplatform/wcm/webui/Utils.java