Bug 551380 - StorageHookFactory.createStorageHook method returns null

The framework must handle when creeateStorageHook returns null when
installing a bundle, saving persistent hook data and loading persistent
hook data.  A new test is added to test all three cases.

Change-Id: I941491e8759b659ea97b129fbab0aa01c84edf5a
Signed-off-by: Thomas Watson <tjwatson@us.ibm.com>
3 files changed