face: increment link layer byte counters in EthernetFace

refs #1780

Change-Id: I27b9c19ef70b976c83f35bcd569dc7eb7f9802cd
tools: fixing bug of misleading lifetime and plural time unit for RIB in HTTP status page

refs #1854 #1855

Change-Id: Ifa112a88210e7882120f529f8c5c3f524d85aa03