Basic auth by HTTPS for API httpds

[Limraj]

Description
One of the uses of this api is to connect several Scada-LTS instances, a convenient way to authenticate clients of this api should be added.

Reproduce

1. Configuration of HTTPS communication for Tomcat
2. Login as admin;
3. Create non-admin user as 'httpds_user', set Password: user;
4. Create Data Source 'HTTP receiver' as rec_ds_1 (enable), and create Data Point as rec_dp_1 ('Data type': numeric, 'HTTP parameter name': temp, enabled);
5. Create Virtual Data Source as vir_ds_1 (enable, update: 1s), and create Data Point as vir_dp_1 (Change Type: Brownian, min: 1, max: 40, min change: 0.2, start value: 23, enabled)
6. Create publisher 'Http Sender' as pub_1 (method: GET, url: https://127.0.0.1:8443/ScadaBR/httpds, Credentials: Username: httpds_user, Password: user, enabled)
7. Click on 'Send static data':
   
   if result is '(no response data)' then ok;
8. Select point 'vir_ds_1 - vir_dp_1' and click 'Add';
9. Change 'Parameter name' on 'temp', and click in Status column in enable;
10. Go to 'Watchlists', and create WatchLists as wl_1 with points: 'rec_ds_1 - rec_dp_1', 'vir_ds_1 - vir_dp_1', if both points change simultaneously, it works ok;