set derby.system.durability to test for performance improvement of unit tests

### 1. Describe the feature

https://docs.oracle.com/javadb/10.10.1.2/ref/rrefproperdurability.html

### 2. Motivation

### 3. Describe the solution

### 4. Additional context

Read the Derby durability reference linked in the issue, then locate the unit-test configuration and measure the current test runtime before changing it. Done means the setting is applied to the unit-test environment, the tests remain correct, and an improvement in test performance is observed.

Written by the indexing model from the issue text.