"VAULT_SKIP_VERIFY" is a standard Hashicorp Vault environment variable
(a string) that needs to get converted to the "vaultCAVerify"
configuration option in the Ceph-CSI format.
The value of "VAULT_SKIP_VERIFY" means the reverse of "vaultCAVerify",
this part was missing in the original conversion too.
Signed-off-by: Niels de Vos <ndevos@redhat.com>