tcp: use 100us timer resolution
tcp: use 100us timer resolution

Experimental reduction of tcp timer resolution from 100ms that
allows for finer grained timers, if needed. Please report
issues if any encountered.

Type: improvement

Signed-off-by: Florin Coras <c9715e5cdf0718c2e9b10678757dfb027875eba2@cisco.com>
Change-Id: I4050f7691aa7365b77298b4427408a4a447834fa

chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp