App ID (#641)

* App ID

* Clean-up

* Use ID or name to reference apps

* Can use app by name or ID

* Get rid of AppName for routes API and model

 routes API is completely backwards-compatible
 routes API accepts both app ID and name

* Get rid of AppName from calls API and model

* Fixing tests

* Get rid of AppName from logs API and model

* Restrict API to work with app names only

* Addressing review comments

* Fix for hybrid mode

* Fix rebase problems

* Addressing review comments

* Addressing review comments pt.2

* Fixing test issue

* Addressing review comments pt.3

* Updated docstring

* Adjust UpdateApp SQL implementation to work with app IDs instead of names

* Fixing tests

* fmt after rebase

* Make tests green again!

* Use GetAppByID wherever it is necessary

 - adding new v2 endpoints to keep hybrid api/runner mode working
 - extract CallBase from Call object to expose that to a user
   (it doesn't include any app reference, as we do for all other API objects)

* Get rid of GetAppByName

* Adjusting server router setup

* Make hybrid work again

* Fix datastore tests

* Fixing tests

* Do not ignore app_id

* Resolve issues after rebase

* Updating test to make it work as it was

* Tabula rasa for migrations

* Adding calls API test

 - we need to ensure we give "App not found" for the missing app and missing call in first place
 - making previous test work (request missing call for the existing app)

* Make datastore tests work fine with correctly applied migrations

* Make CallFunction middleware work again

 had to adjust its implementation to set app ID before proceeding

* The biggest rebase ever made

* Fix 8's migration

* Fix tests

* Fix hybrid client

* Fix tests problem

* Increment app ID migration version

* Fixing TestAppUpdate

* Fix rebase issues

* Addressing review comments

* Renew vendor

* Updated swagger doc per recommendations

api/const.go

@@ -2,9 +2,10 @@ package api
 
 // Request context key names
 const (
-	AppName string = "app_name"
-	Path    string = "path"
-	Call    string = "call"
+	App   string = "app_name"
+	AppID string = "app_id"
+	Path  string = "path"
+	Call  string = "call"
 	// Short forms for API URLs
 	CApp   string = "app"
 	CRoute string = "route"