If we already have the right version of gazel installed, use it

hack/update-bazel.sh

@@ -20,18 +20,17 @@ set -o pipefail
 export KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
 source "${KUBE_ROOT}/hack/lib/init.sh"
 
-git config http.https://gopkg.in.followRedirects true
-
-go get -u gopkg.in/mikedanese/gazel.v14/gazel
+go get gopkg.in/mikedanese/gazel.v14/gazel
 
 for path in ${GOPATH//:/ }; do
-    if [[ -e "${path}/bin/gazel" ]]; then
-      gazel="${path}/bin/gazel"
-      break
-    fi
+  if [[ -e "${path}/bin/gazel" ]]; then
+    gazel="${path}/bin/gazel"
+    break
+  fi
 done
 if [[ -z "${gazel:-}" ]]; then
   echo "Couldn't find gazel on the GOPATH."
   exit 1
 fi
+
 "${gazel}" -root="$(kube::realpath ${KUBE_ROOT})"