Drop kcov/codecov for now, use upstream bats

makefile

@@ -1,4 +1,4 @@
-.PHONY: test shellcheck docopt kcov codecov release-installer
+.PHONY: test shellcheck docopt release-installer
 
 test:
 	@sudo DOCKER_CONTEXT=default docker run \
@@ -7,7 +7,7 @@ test:
 		-d \
 		--name=abra-test-dind \
 		-e DOCKER_TLS_CERTDIR="" \
-		decentral1se/docker-dind-bats-kcov
+		bats/bats \
 	@DOCKER_CONTEXT=default sudo docker exec \
 		-it \
 		abra-test-dind \
@@ -32,19 +32,6 @@ docopt:
 	fi
 	.venv/bin/docopt.sh abra
 
-kcov:
-	@docker run \
-		-it \
-		--rm \
-		-v $$(pwd):/workdir \
-		kcov/kcov:latest \
-		sh -c "kcov /workdir/coverage /workdir/abra || true"
-
-codecov: SHELL:=/bin/bash
-codecov:
-	@bash <(curl -s https://codecov.io/bash) \
-		-s coverage -t $$(pass show hosts/swarm.autonomic.zone/drone/codecov/token)
-
 release-installer:
 	@DOCKER_CONTEXT=swarm.autonomic.zone \
 		docker stack rm abra-installer-script && \