APMLP-1263 use TagMap.set in CoreTracer#11106

dougqh wants to merge 1 commit intomasterDataDog/dd-trace-java:masterfrom

dd/apmlp-1263-tagmap-set-coretracerDataDog/dd-trace-java:dd/apmlp-1263-tagmap-set-coretracerCopy head branch name to clipboard