[API] [UBS] After entering not existing code of certificate, the output code is 200, not 404

[YulianaQC]

Environment: Windows, MacOS.
Reproducible: always.
Build found: 03.02.2021

Preconditions

1. Registered User logged in.
2. Swagger is opened and authorized (https://greencity-ubs.azurewebsites.net/swagger-ui.html)
3. Dabase is opened

Steps to reproduce

1. Click 'order-controller'
2. Click 'GET /ubs/first/certificate/{code} Check if certificate is active'
3. Click 'Try it out' button
4. Enter the code in 'code' field that does not exist in table 'certificate', column 'code' (e.g. 'fgh').
5. Click 'Execute' button

Actual result
Code 200

Expected result
Code 404

User story and test case links
E.g.: "User story #2195
Test case"

Labels to be added
"Bug", Priority ("pri: "), Severity ("severity:"), Type ("UI, "Functional"), "API" (for back-end bugs).

[LiliiaPalii]

Swagger doesn't contain 'order-controller' for checking

[ZaharVeremchuk]

We have 3 different swagger. Its on ubs swagger.
https://greencity-ubs.azurewebsites.net/swagger-ui.html

[ZaharVeremchuk]

@LiliiaPalii