Passwords returned with trailing newline

[xanonid]

vault-keyring-client.py should return the password without a newline at the end to keep compatibility with the case when passwords are entered with --ask-vault-password

Relevant code:

contrib-scripts/vault/vault-keyring-client.py

Line 135 in 85f7604

sys.stdout.write('%s\n' % secret)

Unfortunately, changing this breaks existing usage.