Allow AdvertisedServices to have their own identity and keys. Also, rationalise legalIdentity onto the local node's NodeInfo which is available on ServiceHub
Fixup after rebase
Remove legal identity that was on storage service. Now access via myInfo.legalIdentity and key via keyManagement lookup.
Enforce singleton notary per node for now
Tidy up based upon Rick's suggestions
Handle PR comments
clean up imports
Fix typo
Fixup rename
Capitalise comment
Eliminate unused variable warning
Make changes based upon PR comments
Cleanup whitespace changes
