Migrate to stateless app.App (#17542)

* add request context

* move initialialization to server

* use app interface instead of global app functions

* remove app context from webconn

* cleanup

* remove duplicated services

* move context to separate package

* remove finalize init method and move content to NewServer function

* restart workers and schedulers after adding license for tests

* reflect review comments

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/webhook_test.go

@@ -293,7 +293,7 @@ func TestCreateWebhookPost(t *testing.T) {
 	require.Nil(t, err)
 	defer th.App.DeleteIncomingWebhook(hook.Id)
 
-	post, err := th.App.CreateWebhookPost(hook.UserId, th.BasicChannel, "foo", "user", "http://iconurl", "", model.StringInterface{
+	post, err := th.App.CreateWebhookPost(th.Context, hook.UserId, th.BasicChannel, "foo", "user", "http://iconurl", "", model.StringInterface{
 		"attachments": []*model.SlackAttachment{
 			{
 				Text: "text",
@@ -307,11 +307,11 @@ func TestCreateWebhookPost(t *testing.T) {
 	assert.Contains(t, post.GetProps(), "attachments", "missing attachments prop")
 	assert.Contains(t, post.GetProps(), "webhook_display_name", "missing webhook_display_name prop")
 
-	_, err = th.App.CreateWebhookPost(hook.UserId, th.BasicChannel, "foo", "user", "http://iconurl", "", nil, model.POST_SYSTEM_GENERIC, "")
+	_, err = th.App.CreateWebhookPost(th.Context, hook.UserId, th.BasicChannel, "foo", "user", "http://iconurl", "", nil, model.POST_SYSTEM_GENERIC, "")
 	require.NotNil(t, err, "Should have failed - bad post type")
 
 	expectedText := "`<>|<>|`"
-	post, err = th.App.CreateWebhookPost(hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
+	post, err = th.App.CreateWebhookPost(th.Context, hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
 		"attachments": []*model.SlackAttachment{
 			{
 				Text: "text",
@@ -323,7 +323,7 @@ func TestCreateWebhookPost(t *testing.T) {
 	assert.Equal(t, expectedText, post.Message)
 
 	expectedText = "< | \n|\n>"
-	post, err = th.App.CreateWebhookPost(hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
+	post, err = th.App.CreateWebhookPost(th.Context, hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
 		"attachments": []*model.SlackAttachment{
 			{
 				Text: "text",
@@ -351,7 +351,7 @@ Date:   Thu Mar 1 19:46:48 2018 +0300
 
  test | 3 +++
  1 file changed, 3 insertions(+)`
-	post, err = th.App.CreateWebhookPost(hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
+	post, err = th.App.CreateWebhookPost(th.Context, hook.UserId, th.BasicChannel, expectedText, "user", "http://iconurl", "", model.StringInterface{
 		"attachments": []*model.SlackAttachment{
 			{
 				Text: "text",
@@ -684,7 +684,7 @@ func TestTriggerOutGoingWebhookWithUsernameAndIconURL(t *testing.T) {
 			hook, _ := createOutgoingWebhook(channel, ts.URL, th)
 			payload := getPayload(hook, th, channel)
 
-			th.App.TriggerWebhook(payload, hook, th.BasicPost, channel)
+			th.App.TriggerWebhook(th.Context, payload, hook, th.BasicPost, channel)
 
 			waitUntilWebhookResposeIsCreatedAsPost(channel, th, createdPost)