Unnamed reflections now take the model name/alias

[bcmeireles]

Summary

When creating a model for a reflection, if the name config parameter was not set, the reflection would be named Unnamed Reflection inside Dremio.

Description

Instead, the default behavior should be for the reflection to be named after the model name/alias
The default behavior has been changed, it will now set the name attending to the following priority list:

1. Model config name parameter
2. Model config alias parameter
3. Model name

Test Results

Two new tests have been added to the test suit for reflections, one with the alias parameter and another one with the model name

Changelog

• Added a summary of what this PR accomplishes to CHANGELOG.md

Related Issue

#263