Added test for creating nested metadata dto from flat array
Added test for flattening MetadataDto
Corrected docblock
Added test for creating metadata dto
Added test that checks if metadata is converted to dto when saving Entity
Added test to verify metadata is flattened on save by Connection Service
Added comment
Corrected duplicate test name
Corrected test location
Added documentation
Moved creating Metadata dto to assembler
Moved metadata flatten code to disassembler
Removed unused imports
Added test for metadata definition helper
Metadata dto does no longer require helper
Metadata disassembler now accepts dto
Removed obsolete annotation
Metadata helper is no longer bound to a given type
Removed obsolete param doc
Removed Metadata Dto altogther since it is just a collection of nested data which confused the Serializer