Squashed 'release-tools/' changes from 1748b16..95eac33

95eac33 Merge pull request kubernetes-csi#137 from pohly/fix-go-version-check
437e431 verify-go-version.sh: fix check after removal of travis.yml

git-subtree-dir: release-tools
git-subtree-split: 95eac33629ea9c586c4efcb7ad875191162464b2

Author: pohly

verify-go-version.sh

@@ -31,7 +31,7 @@ version=$("$GO" version) || die "determining version of $GO failed"
 majorminor=$(echo "$version" | sed -e 's/.*go\([0-9]*\)\.\([0-9]*\).*/\1.\2/')
 # SC1091: Not following: release-tools/prow.sh was not specified as input (see shellcheck -x).
 # shellcheck disable=SC1091
-expected=$(. release-tools/prow.sh && echo "$$CSI_PROW_GO_VERSION_BUILD")
+expected=$(. release-tools/prow.sh >/dev/null && echo "$CSI_PROW_GO_VERSION_BUILD")
 
 if [ "$majorminor" != "$expected" ]; then
     cat >&2 <<EOF