Problem description: When the user is going through zabbix setup page, reaches the "Configure DB connection" view and sets "Database type" = Oracle, the "Database TLS encription" option still has a value of 1 and is being sent when submitting the form. As result, the user cannot proceed to the next view without changing the DB type to something else and unseting the checkbox.

Steps to reproduce:

1. Configure Your zabbix installation to use an oracle database
2. Open the setup page
3. Open "Configure DB connection" view
4. Set "Database type" = "Oracle", fill all required fields and press "Next step" button

Result: tls_encryption is sent as 1 in form data. As result, the following error is returned and the user cannot proceed to the next configuration view:

Secure connection for Oracle is not supported.

Expected: "tls_encryption" should always be sent as 0 when DB type is set to Oracle

Expected: