Continued:

Continued:
- added utilities class for branch offices
- added event class/interface for branch offices being added
- added exception when a branch office has already been added
- renamed branchPhoneNumber -> branchLandLineNumber as everywhere is land-line
  used
- sorted members
- added contructor CompanyBranchOffice() with all required fields and validated
  parameters before setting them
- also need to add default constructor as the JPA requires it
- renamed companyDataId -> basicDataId

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