tcp: cleanup scoreboard after recovery
tcp: cleanup scoreboard after recovery

Type: fix

When recovering from congestion, remove last hole in scoreboard if it
covers all bytes sent above snd_congestion.

Change-Id: I752accd4590cd9bf553c35a1bb40a38c308c04f5
Signed-off-by: Florin Coras <c9715e5cdf0718c2e9b10678757dfb027875eba2@cisco.com>

FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp