Adjust event store adapters to support 5.0

[codeliner]

• event-store-mongodb-adapter
• event-store-doctrine-adapter
• event-store-zf2-adapter - Abandoned, see Adjust adapter to support prooph/event-store 5.0 event-store-zf2-adapter#2

Depends on #60

[codeliner]

Decision is made. Adapters will provide a container-aware factory and will be refactored to require all dependencies in the constructor instead of an options array. The adapter helper trait added with #56 will be removed again because it is no longer needed.