Reduce the token generator test to 1s for the whole suite

Description

Reduces the number of tokens generated in the token generator test to speed up tests.

Changes

• The number of tokens is no longer inversely proportional to 1000000₁₆, but rather to 20000₁₆, an 128x "improvement" (we already knew pretty sure that the generator was outputting unique tokens)

Additions

None.

Test and Review

To be filled in by the reviewers

• All of the methods are commented to expectation

• The methods are tested to satisfaction

• There are no unnecessary files present in the MR

• The continuous integration has no problems with the MR

• The MR is filled in as requested (including labels, milestones, and reviewers)

• The documentation is up-to-date

• All nullable parameters are marked as such

core/src/test/java/nl/tudelft/ewi/auta/core/authentication/TokenGeneratorTest.java

@@ -42,7 +42,7 @@ public class TokenGeneratorTest {
     public void testTokenUniqueness(final int bitLength) {
         this.settings.put("token length", bitLength);
 
-        final var numUnique = 0x1000000 / bitLength;
+        final var numUnique = 0x20000 / bitLength;
         logger.info("Generating {} (hopefully) unique {}-bit tokens", numUnique, bitLength);
 
         assertThat(IntStream.range(0, numUnique)