Fixing command to tests with docker

[edilson]

Description

As described on issue #444 the commands dockertest and dockertestreset don't work because the service built with docker is backend, with that said it isn't necessary to especify the path to backend on the commands described.

Motivation and Context

Fix the command to run the test of the backend service on docker.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires documentation updates.
• [ ] I have updated the documentation accordingly.
• [ ] My change requires dependencies updates.
• [ ] I have updated the dependencies accordingly.

[vanessa]

Sorry, @SEdilson!

From what I saw here during my tests, Docker now binds the root directory to the container (this was done in #441, 2 days after I created the issue :disappointed_relieved:), so the command is now correct. We won't need to change it.

I'll close this pull request and the issue related to it, okay?