Initial Commit of Ephemeral Message Support for System Admins (#8611)

Fixed Permission Test

Fixed and extended ephemeral message tests; Removed Online/Activity Updates

Set Create Time to current time

gofmt

model/role.go

@@ -330,6 +330,7 @@ func MakeDefaultRoles() map[string]*Role {
 							PERMISSION_LIST_USERS_WITHOUT_TEAM.Id,
 							PERMISSION_MANAGE_JOBS.Id,
 							PERMISSION_CREATE_POST_PUBLIC.Id,
+							PERMISSION_CREATE_POST_EPHEMERAL.Id,
 							PERMISSION_CREATE_USER_ACCESS_TOKEN.Id,
 							PERMISSION_READ_USER_ACCESS_TOKEN.Id,
 							PERMISSION_REVOKE_USER_ACCESS_TOKEN.Id,