Add shared event manager injection to initializer
Merge branch 'hotfix/3782'

Close #3782
Merge branch 'feature/shared_event_manager_initializer' of git://github.com/Xerkus/zf2 into hotfix/3786
[#3786] Added unit test

- Created unit test to verify behavior
Merge branch 'hotfix/3786' into develop

Forward port #3786