Added 'StorageService#getStorage' for name only

Signed-off-by: Alex Tugarev <telekom@tugarev.de>
Added test for getStorage without classloader

Signed-off-by: Alex Tugarev <telekom@tugarev.de>
Merge pull request #53 from qivicon/storage-service-undo

Added 'StorageService#getStorage' for name only