distrib.c: Changed routine name to be more accurate

from ssa_node_type_str to distrib_node_type_str

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

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: No more need for CORE_INTEGRATION conditionalization in ssa_downstream_db

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