Add local vault mode

[tuxmaster5000]

Until now, an vault server configured with ssl is needed.
But when the vault server runs on the agent system itself, then an normal none ssl session is ok.
And the needed token can be read from an locale file from the client, to which only root has access.
To there are only 2 additional parameters needed.
One boolean for local_mode and the second for the path to the token file.

[tuxmaster5000]

Fix by #16