Honor verification required setting for professional courses in the receipt view

*Background*

When creating a profesional course in CAT (`/courses` view ecommerce) administrator is given option to either enable or disable "Verification" feature for that course. This setting is honored on the LMS `/dashboard` view, however it is not honored on the `/receipt` view.

Only LMS is affected by this change.

*Sandbox URL*: TBD - sandbox is being provisioned.

*Partner information*: 3rd party-hosted open edX instance

*Reviewers*

• [x] @mtyaka

• [ ] edX reviewer[s] TBD

1.  

   1. Testing instructions

*On sandbox*

Login as a verified@example.com user and see following two receipts:

• A receipt for course that does not require verification: http://pr12470.sandbox.opencraft.com/commerce/checkout/receipt/?orderNum=EDX-100007

• A receipt for course that requires verification: http://pr12470.sandbox.opencraft.com/commerce/checkout/receipt/?orderNum=EDX-100008

*On Devstack*
Prepare the enviorment:

1. Install devstack using recent master
2. Setup a payment processor, paypal seems to be the easier one to set up. See setting-up PayPal for some hints
3. Create two new courses in Studio, name one of them "Professional with Verification Required" and another one "Professional no verification".
4. Start e-commerce and go to `localhost:8002/courses`, and add two courses, first one with Verification second one without it.

Reproduce the issue:

1. Register to the platform with a new user, and buy for both courses.
2. Observe that on Receipt for both courses you are asked to confirm your identity.


Verify the fix:

1. Check out this branch.
2. Go to the receipt pages for both courses, and observe that course with enabled verification still
asks user to verify:

3. However for course with verification disabled user can go straight to the dashboard

1.  

   1.  

      1. Setting up PayPal

To configure paypal [add section from this gist](https://gist.github.com/jbzdak/e5761f9f5ac05fee8624d0f966e98961) to `ecommerce/settings/private.py`. And `client_id` and `client_secret`.

I also had problems releated to PayPal forcing TLS 1.2 for all urls (including Sandbox), if you'll get errors citing: 'sslv3 alert handshake failure', you'll need to update `lib-ssl-`, `openssl-` (and probably `curl`) in your devstack.

• - -
  *Settings*
  ```yaml
  SANDBOX_ENABLE_ECOMMERCE: True
  edxapp_worker_default_stopwaitsecs: 1200
  configuration_version: a4c2e31c8a37652e8cda88e498ef9662ff5be19c
  ```