Add power consumption and place of collocation fields to asset

- new column in asset 'power_consumption'
- new column in asset 'place_of_collocation'
- new flag in assetcategory named 'is_power_consumption'
- new flag in assetcategory named 'is_place_of_collocation'
- use DependencyForm
- create common class for BaseAddAssetForm and BaseEditAssetForm with dependencies method
- update tests
Clean project befor pull request
Add gitignore and remove needless .swp file
Merge branch 'develop' into feature/add-power-consumption-and-place-of-collocation
Add commas and remove .gitignore fiel

- Add comma to lastone parameter in declaration power_consumption model in models_assets
- Add comma to lastone parameter in declaration place_of_collocation model in models_assets
- Remove .gitignore file
Remove unused import mock
Change type of power_consumption field from char to int
Add comments to add/edit form classes and asset model
Remove trailing whitespace
Add comment to api_pricing
Add commen to method named denepdency
Remove needless whitespaces
Migrate categories from assets to asset models

- Create category field with relation to asset categories model
- Replace power_consumption column from assets to asset models
- Replace place_of_collocation column from assets to asset models
- Update tests
- Add script to migrate categories from assets to asset models
Migrate categories from assets to asset models

- Create category field with relation to asset categories model
- Replace power_consumption column from assets to asset models
- Replace place_of_collocation column from assets to asset models
- Update tests
- Add script to migrate categories from assets to asset models
Merge branch 'feature/add-power-consumption-and-place-of-collocation' of https://github.com/kula1922/ralph_assets into feature/add-power-consumption-and-place-of-collocation

Conflicts:
	src/ralph_assets/models_assets.py
Change units from W to kWh
Add number of cpu to category model
Clear before pull request

- Fix tests
- Flake8
- Remove needless lines
Merge branch 'develop' into feature/add-power-consumption-and-place-of-collocation
Add number of cpu