access/ssa_path_record.c: Cosmetic formatting change

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
core.c: Cosmetic changes to core_build_tree

Commentary changes
Formatting changes

Signed-off-by: Hal Rosenstock <hal@mellanox.com>
core.c: In core_build_tree, indicate if core node is already joined

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