Please cherry-pick:

- added createManaged() methods for BranchOffice and HeadquartersData entities
- added helper method setAllOpeningTimesCreated() which sets "created" entity
  property of all opening times
- renamed EJB [admin]companyEmployee to only plain [admin]employee (enough),
  remember to write the "e" upper-case in adminEmployee
- added EJB for opening times
- added EJB for departments
- updated persistence unit with new entity class' name

Signed-off-by: Roland Häder <roland@mxchange.org>