EZP-22465: removed deprecated dependency
EZP-22465: removed circular dependency between FieldHandler and ContentType handler
EZP-22465: remove circular dependency between ContentHandler and LocationHandler
EZP-22465: added class description
Merge pull request #808 from ezsystems/impl-EZP-22465-decouple-spi-handlers-2

EZP-22465: Decouple build of handlers in Legacy storage engine