make run.sh executable from within e2e (#619)

Makefile

@@ -1,4 +1,4 @@
-.PHONY: clean local test linux macos docker push scm-source.json e2e-run e2e-tools e2e-build
+.PHONY: clean local test linux macos docker push scm-source.json e2e
 
 BINARY ?= postgres-operator
 BUILD_FLAGS ?= -v
@@ -34,7 +34,10 @@ ifdef CDP_PULL_REQUEST_NUMBER
 	CDP_TAG := -${CDP_BUILD_VERSION}
 endif
 
-KIND_PATH := $(GOPATH)/bin
+ifndef GOPATH
+	GOPATH := $(HOME)/go
+endif
+
 PATH := $(GOPATH)/bin:$(PATH)
 SHELL := env PATH=$(PATH) $(SHELL)
 
@@ -92,15 +95,5 @@ test:
 	hack/verify-codegen.sh
 	@go test ./...
 
-e2e-build:
-	docker build --tag="postgres-operator-e2e-tests" -f e2e/Dockerfile .
-
-e2e-tools:
-	# install pinned version of 'kind' 
-	# leave the name as is to avoid overwriting official binary named `kind`
-	wget https://github.com/kubernetes-sigs/kind/releases/download/v0.3.0/kind-linux-amd64
-	chmod +x kind-linux-amd64
-	mv kind-linux-amd64 $(KIND_PATH)
-
-e2e-run: docker
-	e2e/run.sh
+e2e:
+	cd e2e; make tools test