Account management URLs should not shadow view URLs

[sebtesobe]

Currently, if you create a view that has a name corresponding to a management URL, e.g. 'permissions', that view could never be accessed. I suggest to have the management URLs under /management/ (see #19) and the views under /views/ inside the account-specific URL.

For example, instead of

https://sofisandbox.openbankproject.com/banks/obp-bankx-n/accounts/094455a8-4d95-422d-bf3a-3566ed7af055/public

it would be

https://sofisandbox.openbankproject.com/banks/obp-bankx-n/accounts/094455a8-4d95-422d-bf3a-3566ed7af055/views/public