Switch to bccsp, metrics, flogging in fabric-lib-go (#4678)

The following packages are being moved from fabric to fabric-lib-go so that they can be shared across fabric and fabric-ca:

- github.com/hyperledger/fabric/bccsp
- github.com/hyperledger/fabric/common/flogging
- github.com/hyperledger/fabric/common/metrics

This commit updates fabric to use the common code in fabric-lib-go.

Signed-off-by: David Enyeart <[email protected]>

Author: denyeart

Makefile

@@ -187,12 +187,12 @@ check-deps:
 	./scripts/check_deps.sh
 
 .PHONY: check-metrics-docs
-check-metrics-doc:
+check-metrics-doc: gotool.gendoc
 	@echo "METRICS: Checking for outdated reference documentation.."
 	./scripts/metrics_doc.sh check
 
 .PHONY: generate-metrics-docs
-generate-metrics-doc:
+generate-metrics-doc: gotool.gendoc
 	@echo "Generating metrics reference documentation..."
 	./scripts/metrics_doc.sh generate