Moved the DB layer code into framework-db and change only the necessary projects to refer to it.  Cut down on the dependencies introduced with all the code in utils.
CLOUDSTACK-3818: NFS Cache Improperly Named.
CLOUDSTACK-3818: listSecondaryStagingStore API has been renamed. Here is related UI change.
CLOUDSTACK-3813: UI > change label from Cache Storage to Secondary Staging Store.
DB upgrade: upgraded the bunch of db upgrade files with Apache license header