Description
Several outer request spans are not receiving the correct "db.couchbase.service" tag values per the RFC https://docs.google.com/document/d/1BAPS8bPMv8-4FPIdysgpxEsKrUgd595EAGOU-_nXHRY/edit?pli=1#heading=h.ohzt42x8zkm2
Additionally, many of them are inefficient with repeated lowercasing and calls to unwritable spans.