add go-deadlock tool to help detect deadlocks

Run it with `make test_with_deadlock`. After it's done, use Git to
cleanup `git checkout .`

Link: https://github.com/sasha-s/go-deadlock/
Replaces #3148

CHANGELOG_PENDING.md

@@ -19,6 +19,7 @@ Special thanks to external contributors on this release:
 ### FEATURES:
 
 ### IMPROVEMENTS:
+- [tools] add go-deadlock tool to help detect deadlocks
 
 ### BUG FIXES:
 - [node] \#3186 EventBus and indexerService should be started before first block (for replay last block on handshake) execution

Makefile

@@ -226,6 +226,11 @@ test_race:
 	@echo "--> Running go test --race"
 	@GOCACHE=off go test -p 1 -v -race $(PACKAGES)
 
+test_with_deadlock:
+	find . -name "*.go" | grep -v "vendor/" | xargs -n 1 sed -i.bak 's/sync.RWMutex/deadlock.RWMutex/'
+	find . -name "*.go" | grep -v "vendor/" | xargs -n 1 sed -i.bak 's/sync.Mutex/deadlock.Mutex/'
+	find . -name "*.go" | grep -v "vendor/" | xargs -n 1 goimports -w
+	make test
 
 ########################################
 ### Formatting, linting, and vetting

scripts/get_tools.sh

@@ -51,3 +51,8 @@ installFromGithub golang/dep 22125cfaa6ddc71e145b1535d4b7ee9744fefff2 cmd/dep
 installFromGithub alecthomas/gometalinter 17a7ffa42374937bfecabfb8d2efbd4db0c26741
 installFromGithub gogo/protobuf 61dbc136cf5d2f08d68a011382652244990a53a9 protoc-gen-gogo
 installFromGithub square/certstrap e27060a3643e814151e65b9807b6b06d169580a7
+
+## make test_with_deadlock
+installFromGithub petermattis/goid b0b1615b78e5ee59739545bb38426383b2cda4c9
+installFromGithub sasha-s/go-deadlock d68e2bc52ae3291765881b9056f2c1527f245f1e
+go get golang.org/x/tools/cmd/goimports