Changelog:
b9a5607 Add basic metrics
10a574d Add option to specify main spn map name and update simple testing env
c6d3e8c Log new values for latency, capacity and load
44b4fc6 Adjust hub costs to updated cost calculation
6ae2398 Update map graph api with new data
ef620a6 Improve cost calculation with new data
ac4129c Maintain load, latency and capacity and publish via status
bdebbd5 Add effective bandwidth test based on the capacity op
5c292d2 Tweak flow queue for higher bandwidth
e9d0a42 Fix capacity op and improve its test
c4b164d Simplify tests with new exposed TestTerminal
9073745 Add Flush() to terminal interfaces
f466b45 Add capacity op
e051052 Add latency op
929d7fb Add latency and capacity fields/functions to crane
30df118 Expose and improve test terminal
ce9ea0f Improve terminal error helpers and fix small issues