Specify versions for all 'go install' commands

Makefile

@@ -336,21 +336,23 @@ goimports:
 
 GOPATH=$(shell go env GOPATH)
 .get-deps-stamp:
-	go install github.com/golang/mock/[email protected]
-	cd "${GOPATH}/src/github.com/golang/mock/[email protected]" && git checkout 1.3.1 && go install ./... && go install ./... && cd -
-	go install golang.org/x/tools/cmd/goimports
+	go install golang.org/x/tools/cmd/cover@latest
+	go install github.com/golang/mock/mockgen@latest
+	cd "${GOPATH}/src/github.com/golang/mock/mockgen" && git checkout 1.3.1 && go install ./... && go install ./... && cd -
+	go install golang.org/x/tools/cmd/goimports@latest
 	GO111MODULE=on go install github.com/fzipp/gocyclo/cmd/[email protected]
 	GO111MODULE=on go install honnef.co/go/tools/cmd/[email protected]
 	touch .get-deps-stamp
 
 get-deps: .get-deps-stamp
 
 get-deps-init:
-	go install golang.org/x/tools/cover
-	go install github.com/golang/mock/[email protected]
-	cd "${GOPATH}/src/github.com/golang/mock/[email protected]" && git checkout 1.3.1 && go install ./... && go install ./... && cd -
+	go install golang.org/x/tools/cover@latest
+	go install golang.org/x/tools/cmd/cover@latest
+	go install github.com/golang/mock/mockgen@latest
+	cd "${GOPATH}/src/github.com/golang/mock/mockgen" && git checkout 1.3.1 && go install ./... && go install ./... && cd -
 	GO111MODULE=on go install github.com/fzipp/gocyclo/cmd/[email protected]
-	go install golang.org/x/tools/cmd/goimports
+	go install golang.org/x/tools/cmd/goimports@latest
 	GO111MODULE=on go install honnef.co/go/tools/cmd/[email protected]
 
 amazon-linux-sources.tgz: