gobgpd: Avoid name collision
gobgpd: Avoid name collision

alias "p" for "github.com/kr/pretty" collides the local variable "p" for
Peer structure.
This patch fixes to avoid this name collision and also sorts the import
order with goimports.
  e.g.) goimports -w -local github.com/osrg/gobgp gobgpd/main.go

Signed-off-by: IWASE Yusuke <bb80e84cc9f5a8f01385872ee89032beb5d4eba7@gmail.com>

a16/gobgp,j-kato/gobgp,tamihiro/gobgp,tamihiro/gobgp,tamihiro/gobgp,a16/gobgp,fujita/gobgp,a16/gobgp,a16/gobgp,tamihiro/gobgp,osrg/gobgp,a16/gobgp,j-kato/gobgp,Dipsingh/gobgp,fujita/gobgp,a16/gobgp,fujita/gobgp,Dipsingh/gobgp,a16/gobgp,osrg/gobgp,Dipsingh/gobgp,fujita/gobgp,j-kato/gobgp,osrg/gobgp,osrg/gobgp