Secure the HTTP input plugin with HTTP Basic Authentication

[dlvenable]

Is your feature request related to a problem? Please describe.

Data Prepper's HTTP endpoint is currently unsecured. Thus, users must either add a proxy on the host, or leave them open to network access.

Describe the solution you'd like

Support HTTP Basic Authentication on the HTTP input endpoint. Additionally, we will turn this on by default with a preconfigured username and password. Users will be able to turn off the HTTP security.

Additional context

This is related to #314 and #312

[dlvenable]

The configuration I'm envisioning is this:

http:
  authentication:
    name: http_basic
    username: admin
    password: admin

Similar to #312, this will use the plugin framework to load the authentication support as a plugin, allowing for a more dynamic extensibility.

[laneholloway]

This looks reasonable, does the name correspond to a plugin?

[dlvenable]

Yes, there would be a plugin with the name http_basic.

It might look something like:

@DataPrepperPlugin(name = "http_basic", pluginType = ArmeriaAuthenticationProvider.class)

[dlvenable]

My previous configuration was somewhat different from a normal plugin in Data Prepper as they are now.

I believe it would end up looking like:

http:
  port: 8000
  authentication:
    http_basic:
      username: admin
      password: admin

This would be more consistent with the existing plugins as used in sink, source, prepper.