update test docker image Go version to 1.10

test/docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.9.4
+FROM golang:1.10
 
 # Add testing deps for curl
 RUN echo 'deb http://httpredir.debian.org/debian testing main non-free contrib' >> /etc/apt/sources.list
@@ -29,7 +29,6 @@ RUN bash scripts/install_abci_apps.sh
 # NOTE: this will overwrite whatever is in vendor/
 COPY . $REPO
 
-
 RUN go install ./cmd/tendermint
 
 # expose the volume for debugging