Remove file storage from project schema

[wehrler]

Removed file storage from project schema and refactored project api file storage logic.

[FedericoNegri]

Since the storage is now an endpoint at the root level (corresponding to JmsApi), I think we should:

• add a JmsApi.get_storage() method that simply returns the json response (let's not add schemas for this)
• move project_api.get_fs_url to jms_api, it should now take JmsApi as argument
• expose a property fs_url in both JmsApi and ProjectApi

[wehrler]

Since the storage is now an endpoint at the root level (corresponding to JmsApi), I think we should:

• add a JmsApi.get_storage() method that simply returns the json response (let's not add schemas for this)
• move project_api.get_fs_url to jms_api, it should now take JmsApi as argument
• expose a property fs_url in both JmsApi and ProjectApi

@FedericoNegri - *see latest implementation. Note - I changed the arguments to get_fs_url to match the pattern in jms api.

[FedericoNegri]

Since the storage is now an endpoint at the root level (corresponding to JmsApi), I think we should:

• add a JmsApi.get_storage() method that simply returns the json response (let's not add schemas for this)
• move project_api.get_fs_url to jms_api, it should now take JmsApi as argument
• expose a property fs_url in both JmsApi and ProjectApi

@FedericoNegri - *see latest implementation. Note - I changed the arguments to get_fs_url to match the pattern in jms api.

@wehrler Looks good to me. Once backend changes are in we can move on with this one as well. Before that, let's quickly discuss whether it's worth bumping version.