Replace Mix.env checks with capture log in tests

This was the original intent (as far as I can see), but I think I had not found capture_log yet when I wrote the code.

lib/toniq/job_importer.ex

@@ -28,9 +28,7 @@ defmodule Toniq.JobImporter do
 
   defp log_import([]), do: []
   defp log_import(jobs) do
-    if Mix.env != :test do
-      Logger.log(:info, "#{__MODULE__}: Importing #{Enum.count(jobs)} jobs from incoming_jobs")
-    end
+    Logger.log(:info, "#{__MODULE__}: Importing #{Enum.count(jobs)} jobs from incoming_jobs")
 
     jobs
   end

lib/toniq/takeover.ex

@@ -40,9 +40,7 @@ defmodule Toniq.Takeover do
 
   defp handle_missing_vm(nil, _state), do: nil
   defp handle_missing_vm(identifier, state) do
-    if Mix.env != :test do
-      Logger.log(:info, "#{__MODULE__}: Taking over all jobs from missing vm #{identifier}")
-    end
+    Logger.log(:info, "#{__MODULE__}: Taking over all jobs from missing vm #{identifier}")
 
     Toniq.KeepalivePersistence.takeover_jobs(identifier, Toniq.Keepalive.identifier(state.keepalive_name))
   end

test/toniq/failover_test.exs

@@ -19,6 +19,7 @@ defmodule Toniq.FailoverTest do
   # leads to unreliable tests). Instead of multiple VMs we simply persist a job as-if
   # there was another VM (different key names in redis) and then stop the keepalive for
   # that fake VM and ensure the job is taken over by the test VM.
+  @tag :capture_log
   test "orphaned jobs are taken over and run" do
     Process.register self, :failover_test
 

test/toniq/job_importer_test.exs

@@ -14,6 +14,7 @@ defmodule Exredis.JobImporterTest do
     :ok
   end
 
+  @tag :capture_log
   test "imports jobs from the incoming_jobs queue" do
     Process.register self, :toniq_job_importer_test
     Toniq.JobPersistence.store_incoming_job(TestWorker, data: 10)

test/toniq/takeover_test.exs

@@ -13,6 +13,7 @@ defmodule Exredis.TakeoverTest do
     :ok
   end
 
+  @tag :capture_log
   test "takes over orphaned jobs" do
     current_vm = Toniq.Keepalive.identifier
     other_vm = start_keepalive(:other_vm)