MM-8796: Full implementation of "Schemes" in Store/Model/App layers. (#8357)

* Add Scheme model and stub store.

* Port ChannelStore to be Scheme aware.

* Make almost all the API/APP layer work with ChannelSchemes.

Only thing still hacky is UpdateChannelMemberRoles().

* Add basic SchemeStore implementation.

* Migrate UpdateChannelMemberRoles properly and fix tests.

* Update store tests and mocks so they work.

* Include creating default roles in Scheme create store function.

* Implement role deletion and start scheme deletion.

* Only use non-deleted roles for authorization.

* Add GetByScheme method to Team store.

* Add GetChannelsByScheme.

* Update store mocks.

* Implement scheme deletion in the store.

* Rename is valid function.

* Add offset and limit to queries to fetch teams and channels by scheme.

* Fix queries.

* Implement scheme awareness in Team store and add a migration.

* Tidy up ChannelStore mapping functions and add exhaustive unit tests.

* Add all missing i18n.

* Proper tests for TeamStore internal functions and fix them.

* Make additional TeamMember fields nullable.

* Make new ChannelMember fields nullable.

* Create new nullable columns without defaults.

* Make new fields in large tables nullalble.

* Fix empty list of TeamMembers.

* Deduplicate SQL queries.

* Fix spelling.

* Fix review comment.

* More review fixes.

* More review fixes.

api4/apitestlib.go

@@ -765,7 +765,7 @@ func (me *TestHelper) MakeUserChannelAdmin(user *model.User, channel *model.Chan
 
 	if cmr := <-me.App.Srv.Store.Channel().GetMember(channel.Id, user.Id); cmr.Err == nil {
 		cm := cmr.Data.(*model.ChannelMember)
-		cm.Roles = "channel_admin channel_user"
+		cm.SchemeAdmin = true
 		if sr := <-me.App.Srv.Store.Channel().UpdateMember(cm); sr.Err != nil {
 			utils.EnableDebugLogForTest()
 			panic(sr.Err)
@@ -781,28 +781,36 @@ func (me *TestHelper) MakeUserChannelAdmin(user *model.User, channel *model.Chan
 func (me *TestHelper) UpdateUserToTeamAdmin(user *model.User, team *model.Team) {
 	utils.DisableDebugLogForTest()
 
-	tm := &model.TeamMember{TeamId: team.Id, UserId: user.Id, Roles: model.TEAM_USER_ROLE_ID + " " + model.TEAM_ADMIN_ROLE_ID}
-	if tmr := <-me.App.Srv.Store.Team().UpdateMember(tm); tmr.Err != nil {
+	if tmr := <-me.App.Srv.Store.Team().GetMember(team.Id, user.Id); tmr.Err == nil {
+		tm := tmr.Data.(*model.TeamMember)
+		tm.SchemeAdmin = true
+		if sr := <-me.App.Srv.Store.Team().UpdateMember(tm); sr.Err != nil {
+			utils.EnableDebugLogForTest()
+			panic(sr.Err)
+		}
+	} else {
 		utils.EnableDebugLogForTest()
-		l4g.Error(tmr.Err.Error())
-		l4g.Close()
-		time.Sleep(time.Second)
 		panic(tmr.Err)
 	}
+
 	utils.EnableDebugLogForTest()
 }
 
 func (me *TestHelper) UpdateUserToNonTeamAdmin(user *model.User, team *model.Team) {
 	utils.DisableDebugLogForTest()
 
-	tm := &model.TeamMember{TeamId: team.Id, UserId: user.Id, Roles: model.TEAM_USER_ROLE_ID}
-	if tmr := <-me.App.Srv.Store.Team().UpdateMember(tm); tmr.Err != nil {
+	if tmr := <-me.App.Srv.Store.Team().GetMember(team.Id, user.Id); tmr.Err == nil {
+		tm := tmr.Data.(*model.TeamMember)
+		tm.SchemeAdmin = false
+		if sr := <-me.App.Srv.Store.Team().UpdateMember(tm); sr.Err != nil {
+			utils.EnableDebugLogForTest()
+			panic(sr.Err)
+		}
+	} else {
 		utils.EnableDebugLogForTest()
-		l4g.Error(tmr.Err.Error())
-		l4g.Close()
-		time.Sleep(time.Second)
 		panic(tmr.Err)
 	}
+
 	utils.EnableDebugLogForTest()
 }