Scaling, SaaS, Promotions wizard rework

Set correct scaling for customers before go-live and added configuration for seeding, so that this won't be applied in production, see our updated Azure scaling page for more information about the resources and variables in the scaling configuration.
Performance Service bus improvements, please see Service bus performance.
OMS
- Activation codes now can be generated, configuration for generation can be set in Azure scaling
- Promotions rework on promotions module. More information: Promotions
SaaS
- Added 'Disallow: /' in robots.txt for internal hosts (for example 127.0.0.1 and *azurewebsites.net) to prevent indexation
- General bugfixes and improvements