Memory implementation garbage collectors.
Merged 'develop'.
Refactoring MemoryGarbageCollectorBackend.
Start implementation HaHzGarbageCollectorBackend.
Merged 'develop'.
First implementation BaseStorage.
Revert "First implementation BaseStorage."

This reverts commit 716b1a167943e068085f38e2b6034711ac1e6721.
Merged 'develop'.
Merged 'develop'.
Add HzGarbageCollectorBackend. Refactoring MemoryGarbageCollectorBackend.
Add implementation for GarbageCollectorBackend in others backends.
Merged 'develop'.
Add mock implementation for GarbageCollectorBackend.
Add mock implementation for GarbageCollectorBackend.
Simplification consturctors for BaseStorageFactory and CommonStorageFactory.
Add GarbageCollectorBackend to configs.
Fix configuration.
Add HzGarbageCollectorBackend
Delete decisions in GraphDao.
Add default keepTime for each process before delte it.