The fileplan node and the special containers (unfiled, holds, transfers) can be deleted using the core REST api or the java API.
Steps to reproduce: using the core's nodes REST api make the following REST call :
Expected behavior: An exception should be thrown when trying to delete the special container alone. The special containers should be deletable when the RM site is deleted.
Actual behavior: The node is deleted
The check should be added in the java service and an integration test added to make sure the special containers can't be deleted vi java API.
Note: the fileplanComponents api has a check that should be removed once fixed properly (see RMSitesImpl:deleteNode).