ISSUE 1518 - Attempt to resolve deletion errors from sharedData (#1556)
ISSUE 1518 - Attempt to resolve deletion errors from sharedData (#1556)

* ISSUE #1518 - Force deletion of non-empty directory

* ISSUE #1518 - Use sync deletion methods instead of async

3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io,3drepo/3drepo.io