Consolidate use of IP fib functions in LISP CP
Consolidate use of IP fib functions in LISP CP

Clean up, refactor and consolidate LISP CP functions that interact with
ip interfaces and fibs.

Change-Id: I214eaebbec8d43646118df0948d0f82f923a5b43
Signed-off-by: Florin Coras <c9715e5cdf0718c2e9b10678757dfb027875eba2@cisco.com>

chrisy/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,FDio/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,milanlenco/vpp,chrisy/vpp,FDio/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,muharif/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,muharif/vpp,FDio/vpp,milanlenco/vpp,chrisy/vpp,vpp-dev/vpp,muharif/vpp,muharif/vpp,FDio/vpp,vpp-dev/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,milanlenco/vpp,milanlenco/vpp,muharif/vpp,muharif/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp