Groups converted to lowercase

[gobins]

Vault Version: 0.7.0

When writing group config to an ldap user, the group name gets converted into lower case.

vault write auth/ldap/users/john groups=TEST
Success! Data written to: auth/ldap/users/john

vault read auth/ldap/users/john

Key Value

---

groups test

In the output for vault read, the group name has been converted to lowercase. This is causing issues because there are no groups with the name 'test'.

This issue could have been introduced in 0.6.5.