LU-12410 lnet: Convert yaml peer configuration

LU-12410 lnet: Convert yaml peer configuration

Convert the yaml peer config handlers to utilize the new capabilities
provided by the nidstrings library.

Test-Parameters: trivial
Test-Parameters: testlist=sanity-lnet
Signed-off-by: Chris Horn <hornc@cray.com>
Change-Id: I89a53ded636877661a3600822ca49030c8841540
Reviewed-on: https://review.whamcloud.com/35307
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>