examples/pipeline: support selector table
examples/pipeline: support selector table

Add application-level support for selector tables.

Signed-off-by: Churchill Khangar <611dd77c1ed1d7a1964f5f22136f8fd40ad065cc@intel.com>
Signed-off-by: Cristian Dumitrescu <25468b8a3698eeb3c368247f8635924bb4a1ce2c@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk