add vendoring with go dep

vendor/github.com/influxdata/influxdb/releng/unit-tests/Dockerfile

@@ -0,0 +1,15 @@
+ARG GO_VERSION
+FROM golang:${GO_VERSION}-alpine
+
+RUN apk add --no-cache \
+      bash \
+      jq \
+      git
+
+RUN go get -u github.com/jstemmer/go-junit-report && \
+      mv /go/bin/go-junit-report /usr/bin/go-junit-report && \
+      rm -rf /go/*
+
+COPY fs/ /
+
+ENTRYPOINT ["influxdb_prebuild_tests.bash"]

vendor/github.com/influxdata/influxdb/releng/unit-tests/fs/usr/local/bin/influxdb_prebuild_tests.bash

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Extract tarball into GOPATH.
+tar xz -C "$GOPATH" -f /influxdb-src.tar.gz
+
+cd "$GOPATH/src/github.com/influxdata/influxdb"
+go test -v ./... 2>&1 | tee /out/tests.log | go-junit-report > /out/influxdb.junit.xml

vendor/github.com/influxdata/influxdb/releng/unit-tests/run.bash

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+function printHelp() {
+  >&2 echo "USAGE: $0 -i PATH_TO_SOURCE_TARBALL -o OUTDIR
+
+Runs unit tests for influxdb.
+
+If the environment variable GO_NEXT is not empty, tests run with the 'next' version of Go.
+"
+}
+
+if [ $# -eq 0 ]; then
+  printHelp
+  exit 1
+fi
+
+SRCDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SRCDIR/../_go_versions.sh"
+
+OUTDIR=""
+TARBALL=""
+
+while getopts hi:o: arg; do
+  case "$arg" in
+    h) printHelp; exit 1;;
+    i) TARBALL="$OPTARG";;
+    o) OUTDIR="$OPTARG";;
+  esac
+done
+
+if [ -z "$TARBALL" ] || [ -z "$OUTDIR" ]; then
+  printHelp
+  exit 1
+fi
+
+if [ -z "$GO_NEXT" ]; then
+  DOCKER_TAG=latest
+  GO_VERSION="$GO_CURRENT_VERSION"
+else
+  DOCKER_TAG=next
+  GO_VERSION="$GO_NEXT_VERSION"
+fi
+docker build --build-arg "GO_VERSION=$GO_VERSION" -t influxdata/influxdb/releng/unit-tests:"$DOCKER_TAG" "$SRCDIR"
+
+docker run --rm \
+   --mount type=bind,source="$OUTDIR",destination=/out \
+   --mount type=bind,source="$TARBALL",destination=/influxdb-src.tar.gz,ro=1 \
+  influxdata/influxdb/releng/unit-tests:"$DOCKER_TAG"