Fix go-report-card-test (#55)

Author: bwagner5

test/go-report-card-test/Dockerfile

@@ -3,7 +3,7 @@ FROM golang:1
 WORKDIR /app
 
 RUN go get github.com/gojp/goreportcard
-RUN cd $GOPATH/src/github.com/gojp/goreportcard && make install
+RUN cd $GOPATH/src/github.com/gojp/goreportcard && (make install || cd / && curl -L https://git.io/vp6lP | sh)
 
 RUN go get github.com/gojp/goreportcard/cmd/goreportcard-cli