Release 3.9.3_6.8.1

[manuasir]

Wazuh version: 3.9.3 Elastic version: 6.8.1

• [ ] Adapt to new versions (3.9.3 - 6.8.1)
• [ ] Update changelog
• [ ] Tests
• [ ] Tag: v3.9.3_6.8.1
• [ ] Draft release

[manuasir]

We're not going to maintain Elastic 6.x in this repository any longer.