improve circleci config

- update docker machine version to 0.9.0
- save coverage.txt as artifact
- save docker logs as artifact
- test if coverage.txt exists
- 2>&1 redirect stderr to stdout in tests

test/test.sh

@@ -29,6 +29,6 @@ if [[ $(echo "$BRANCH" | grep "release-") != "" ]]; then
 	echo ""
 	echo "TODO: run network tests"
 	#echo "* branch $BRANCH; running mintnet/netmon throughput benchmark"
-	# TODO: replace mintnet 
+	# TODO: replace mintnet
 	#bash test/net/test.sh
 fi

test/test_cover.sh

@@ -5,7 +5,7 @@ PKGS=$(go list github.com/tendermint/tendermint/... | grep -v /vendor/)
 set -e
 echo "mode: atomic" > coverage.txt
 for pkg in ${PKGS[@]}; do
-	go test -timeout 30m -race -coverprofile=profile.out -covermode=atomic $pkg
+	go test -v -timeout 30m -race -coverprofile=profile.out -covermode=atomic $pkg
 	if [ -f profile.out ]; then
 		tail -n +2 profile.out >> coverage.txt;
 		rm profile.out

test/test_libs.sh

@@ -21,7 +21,7 @@ for lib in "${LIBS_GO_TEST[@]}"; do
 	bash scripts/glide/checkout.sh $GLIDE $lib
 
 	echo "Testing $lib ..."
-	go test --race github.com/tendermint/$lib/...
+	go test -v --race github.com/tendermint/$lib/...
 	if [[ "$?" != 0 ]]; then
 		echo "FAIL"
 		exit 1