core.c: Improve some debug log messages in core_extract_handler

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
ssa.c: Check for SMDB connection before checking/updating update flags

in ssa_downstream_handle_op for SSA_MSG_DB_QUERY_DATA_DATASET operation

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