ssa.c: Cosmetic formatting change to copyright for LLNL

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: Update flow for access node and combined distribution + access node

Prepare to update and Ready for update messages are added
prior to DB update message.

A number of debug log messages were left in for now.

Combined core + access node is not yet supported with update flow.

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: In ssa_upstream_handle_op, add debug log message

to show the number of (DB update) prepare messages sent by upstream.

Same as debug log message in core upon handling extract event.

Signed-off-by: Hal Rosenstock <hal@mellanox.com>