Add support for wpaeap and radius profiles

[paultyng]

Fixes #26, this also requires paultyng/go-unifi#4

[mjohnson9]

I'll test this later today.

[mjohnson9]

This works correctly for me with:

data "unifi_radius_profile" "USG" {
  name = "USG"
}

resource "unifi_wlan" "main" {
  name          = "main"
  wlan_group_id = data.unifi_wlan_group.default.id
  user_group_id = unifi_user_group.default.id

  vlan_id = unifi_network.wlan.vlan_id

  security          = "wpaeap"
  radius_profile_id = data.unifi_radius_profile.USG.id
}

In order to get the package to build, I had to run go mod edit -require github.com/paultyng/go-unifi@radius. After that, I ran go build -o ~/.terraform.d/plugins/darwin_amd64/terraform-provider-unifi_v0.7.1 and changed the provider version in my config to 0.7.1. I changed my WLAN config to the above (some details renamed) and ran terraform plan. The plan was correct. Then, I ran terraform apply and RADIUS now works as expected.

Now if only I could get the USG to use a proper certificate for RADIUS... but, we can't fix that through the UniFi Controller.

[paultyng]

Great, I can merge this later today hopefully and cut an actual release.