Removed the hacks that were needed pre Golang v1.11

This included special handling of go.sum and awkward downloading of
depenedencies.

Dockerfile

@@ -10,22 +10,10 @@ ENV GOOS=linux \
     CGO_ENABLED=1
 
 COPY go.mod go.sum /secretless/
-
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum
-
-# https://github.com/golang/go/issues/26610
-RUN go list -e $(go list -f '{{.Path}}' -m all 2>/dev/null)
+RUN go mod download
 
 COPY . /secretless
 
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum
-
 RUN go build -o dist/$GOOS/$GOARCH/secretless-broker ./cmd/secretless-broker && \
     go build -o dist/$GOOS/$GOARCH/summon2 ./cmd/summon2
 

Dockerfile.dev

@@ -29,14 +29,7 @@ RUN go get -u github.com/jstemmer/go-junit-report && \
     go get golang.org/x/tools/cmd/goimports
 
 COPY go.mod go.sum /secretless/
-
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum
-
-# https://github.com/golang/go/issues/26610
-RUN go list -e $(go list -f '{{.Path}}' -m all 2>/dev/null)
+RUN go mod download
 
 # TODO: Expand this with build args when we support other arches
 ENV GOOS=linux \
@@ -45,11 +38,6 @@ ENV GOOS=linux \
 
 COPY . .
 
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum
-
 # Not strictly needed but we might as well do this step too since
 # the dev may want to run the binary
 RUN go build -o dist/$GOOS/$GOARCH/secretless-broker ./cmd/secretless-broker && \

Dockerfile.test

@@ -12,18 +12,6 @@ RUN apk add -u curl \
                musl-dev
 
 COPY go.mod go.sum /secretless/
-
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum
-
-# https://github.com/golang/go/issues/26610
-RUN go list -e $(go list -f '{{.Path}}' -m all 2>/dev/null)
+RUN go mod download
 
 COPY . .
-
-# There are checksum mismatches in various environments with client-go package
-# so we for now manually remove it from the checksum file. Golang 1.11rc1+ seems
-# to have fixed this issue.
-RUN sed -i '/^k8s.io\/client-go\ /d' /secretless/go.sum