Bug 548780 - Add handleContentConnection method to StorageHookFactory

Make StorageHook not abstract to make it easier to implement
StorageHookFactory and allow the storage hook factory to return null
from createStorageHook

Change-Id: I654f1d9f051df8e8f6c9c3912d0814588e58280d
Signed-off-by: Thomas Watson <tjwatson@us.ibm.com>
4 files changed