Fixed constant change-loops in the 'okta_app_group_assignments' resource

[bogdanprodan-okta]

Fix #611

For Terraform v1.0.6

1. Create several groups:

resource "okta_group" "this" {
  count = 5
  name        = "testAcc_${count.index}"
  description = "testAcc_${count.index}"
}

2. Read these groups into the data-source, create app and assign these gro

data "okta_groups" "test" {
  q = "testAcc_"
}

resource "okta_app_oauth" "test" {
  label          = "testAcc_replace_with_uuid"
  type           = "web"
  grant_types    = ["implicit", "authorization_code"]
  redirect_uris  = ["http://d.com/"]
  response_types = ["code", "token", "id_token"]
  issuer_mode    = "ORG_URL"

  lifecycle {
    ignore_changes = [users, groups]
  }
}

resource "okta_app_group_assignments" "saml" {
  app_id = okta_app_oauth.test.id

  dynamic "group" {
    for_each = data.okta_groups.test.groups

    content {
      id       = group.value.id
      priority = try(group.key+1, null)
      profile  = try(jsonencode(group.value.profile), "{}")
    }
  }
}

Running terraform apply several times shows No changes. Your infrastructure matches the configuration.