don't store vault's dev root token

Running the dependency/ tests runs vault in dev mode which created
~/.vault-token by default. This then persisted and messed with manual
testing if you didn't remember to remove it. Adding the option to the
tests to keep it from saving the token to that file.

Fixes #1353

dependency/dependency_test.go

@@ -126,7 +126,8 @@ func runTestVault() {
 	if err != nil || path == "" {
 		Fatalf("vault not found on $PATH")
 	}
-	args := []string{"server", "-dev", "-dev-root-token-id", vaultToken}
+	args := []string{"server", "-dev", "-dev-root-token-id", vaultToken,
+		"-dev-no-store-token"}
 	cmd := exec.Command("vault", args...)
 	cmd.Stdout = ioutil.Discard
 	cmd.Stderr = ioutil.Discard