Added domain-module to dependency-management.
Created persistence-module.
Added interface for port-repository.
Created persistence-mybatis-module.
Added mybatis as dependency.
Added some mass-operations to interface of port-repository.
Added javax.inject as dependency to mybatis implementation of persistence-module.
Changed constructor of Port-Entity.

Changed constructor of Port-Entity so it can be called by some
entity-frameworks with the need of an wrapper.
Added MyBatis PortRepository.
Added some unit-tests for port-entity constructor.
Added Tests for MyBatisPortRepository.
Added integration-test module for mybatis-persistence-module.