Adding changes to separate unit tests and integration tests (#13670)

* Introducing unit (not integration) tests for the app layer

* Initial support for unit tests at the API

* Adding unit tests support to the store layer

* Add unit tests support in commands

* Adding last tests needed for run unit tests properly

* Fixing govet

* Removing some duplication

* Fixing tests

* Fixing tests

* Not compiling test helpers with the main module for api

* Revert "Not compiling test helpers with the main module for api"

This reverts commit 36a199bbe0f7503f665f5d6c7b41c53aabc2e54f.

* Fixing tests

* Fixing unit tests

* More consistency between api4/apiteslib.go and app/helper_test.go

* Renaming things to make more obvious the new Setup functions purpose

* Reverting change in go.sum

* Start with empty mock for app layer

* Start with empty mock for api layer

* Start with empty mock for web layer

* Renaming SetupWithStoreMockConfig to SetupConfigWithStoreMock

* Fixing tests on web package

* Removing unnecesary function

store/sqlstore/store_test.go

@@ -30,7 +30,12 @@ func StoreTest(t *testing.T, f func(*testing.T, store.Store)) {
 	}()
 	for _, st := range storeTypes {
 		st := st
-		t.Run(st.Name, func(t *testing.T) { f(t, st.Store) })
+		t.Run(st.Name, func(t *testing.T) {
+			if testing.Short() {
+				t.SkipNow()
+			}
+			f(t, st.Store)
+		})
 	}
 }
 
@@ -43,11 +48,19 @@ func StoreTestWithSqlSupplier(t *testing.T, f func(*testing.T, store.Store, stor
 	}()
 	for _, st := range storeTypes {
 		st := st
-		t.Run(st.Name, func(t *testing.T) { f(t, st.Store, st.SqlSupplier) })
+		t.Run(st.Name, func(t *testing.T) {
+			if testing.Short() {
+				t.SkipNow()
+			}
+			f(t, st.Store, st.SqlSupplier)
+		})
 	}
 }
 
 func initStores() {
+	if testing.Short() {
+		return
+	}
 	storeTypes = append(storeTypes, &storeType{
 		Name:        "MySQL",
 		SqlSettings: storetest.MakeSqlSettings(model.DATABASE_DRIVER_MYSQL),
@@ -81,6 +94,9 @@ func initStores() {
 var tearDownStoresOnce sync.Once
 
 func tearDownStores() {
+	if testing.Short() {
+		return
+	}
 	tearDownStoresOnce.Do(func() {
 		var wg sync.WaitGroup
 		wg.Add(len(storeTypes))