[FEATURE] extended save method for products for creating attributes

Extended save method for products for creating attributes:

__Tasks:__

- [ ] Extend productManager to handle attributes
- [ ] gather feedback for my changes



__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| Tests pass?   | none
| Fixed tickets | none
| Doc           | none