PIM-1950 : move attribute and entity cache
PIM-1950 : move converter
PIM-1950 : move encoder
PIM-1950 : move normalizer
PIM-1950 : move transformers
PIM-1950 : move exceptions to base connector and transform bundles
PIM-1950 : move cache test
PIM-1950 : move encoder test
PIM-1950 : move normalizer tests
PIM-1950 : move transformers tests
PIM-1950 : move stub
PIM-1950 : move services configuration
PIM-1950 : introduce a transform extension
PIM-1950 : move specs
PIM-1950 : update specs
PIM-1950 : update references in versioning (now use transform bundle)
PIM-1950 : update references in base connector
PIM-1950 : update references in import export
PIM-1950 : update references in installer