Test failure: TestBasicModelG.testRandomScoring (small numeric delta comparison error) [LUCENE-8052]

This seed reproduces for me on master:
```
1 tests failed.
FAILED: org.apache.lucene.search.similarities.TestBasicModelG.testRandomScoring

Error Message:
score(1.0,13)=5.3288637E9 < score(1.0,14)=5.3288643E9

Stack Trace:
java.lang.AssertionError: score(1.0,13)=5.3288637E9 < score(1.0,14)=5.3288643E9
at __randomizedtesting.SeedInfo.seed([F07F8B266257D392:7BE0D29478203598]:0)
at org.junit.Assert.fail(Assert.java:93)
at org.apache.lucene.search.similarities.BaseSimilarityTestCase.doTestScoring(BaseSimilarityTestCase.java:423)
at org.apache.lucene.search.similarities.BaseSimilarityTestCase.testRandomScoring(BaseSimilarityTestCase.java:355)
```
...

---
Migrated from [LUCENE-8052](https://issues.apache.org/jira/browse/LUCENE-8052) by David Smiley (@dsmiley)

Start by reproducing the reported failure with seed F07F8B266257D392:7BE0D29478203598. Read org.apache.lucene.search.similarities.TestBasicModelG.testRandomScoring and BaseSimilarityTestCase.testRandomScoring, including the assertion at BaseSimilarityTestCase.java:423. Done means the randomized scoring test no longer fails for the reported case without weakening its intended checks.

Written by the indexing model from the issue text.