doc: update release notes for 17.02
doc: update release notes for 17.02

Fix grammar, spelling and formatting of DPDK 17.02 release notes.

Signed-off-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>

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