ApiKey authentication

[alozano3]

Problem

There is no support for ApiKey Header authentication which is used in ES cloud version

Solution

Add a new property to put the API Key and use it to authenticate. It also checks if basic authentication is configured.

Does this solution apply anywhere else?

• [ ] yes
• [ ] no

If yes, where?

Test Strategy

Testing done:

• [x] Unit tests
• [x] Integration tests
• [ ] System tests
• [x] Manual tests

Release Plan