Allow to fetch storage from SL
Add test
Removing greybox testing and using invocation mocks instead
Add default session
Merge pull request #2 from doctrine/fetch-session-sl-tests

Removing greybox testing and using invocation mocks instead
Rename invokable
Merge branch 'fetch-session-sl' of github.com:bakura10/DoctrineModule into fetch-session-sl
Merge pull request #275 from bakura10/fetch-session-sl

Allow to fetch storage from SL