Local Authority Files: Validate file creation

Purpose
To have the ability to create local authority source files we should validate some field before creation and updating.

Approach

New parameter 'startNumber' for authority source file creation is presented 

Implement AuthoritySourceFileHridManager:
 Validate source file during creation:
    - File have 'source' = 'local' and 'codes.size' != 1 -> throw exception
    - File have 'source' = 'local' and 'startNumber' = null. -> Set startValue = 1

 Validate source file during update:
   - Prevent user to update "start with" after file creation
   - Prevent user to update array "codes" (prefix) after file creation (Should be discussed with PO)

Acceptance criteria

• Covered by unit tests
• Module documentation updated
• Logging is well-defined