Skip network metric comparison for newly added interfaces
Skip network metric comparison for newly added interfaces

Fixes #112

krakatoa/riemann-tools,pepoirot/riemann-tools,shanielh/riemann-tools,peterneubauer/riemann-tools,uswitch/riemann-tools,nandudheeraj/riemann-tools,tehgeekmeister/riemann-tools,riemann/riemann-tools,aphyr/riemann-tools,riemann/riemann-tools,hybris/riemann-tools