Drop unused/unneeded attribute
Drop unnecessary log resource
Add storage config attributes & template

Doing it this way allows the config to be endlessly extensible,
rather than trying to capture all of a neverending set of
config directives & values.

The values input here do reflect the Cassandra defaults, and
will need some maintenance to be kept up to date.
Use more specific name for topo search string
Use partial search for finding nodes for topology
Populate seeds with specified nodes

Default is to use a role, but any search string will work.