Number of generated tests is not properly counted in some cases

[tyuldashev]

Description

For package generation notification may show much less number of test than actually generated

To Reproduce

Steps to reproduce the behavior:

1. Open UTBot Java project
2. Generate tests for utbot-sample/src/main/java/org/utbot/examples/algorithms/errors package. Without mocking result message is clearer but problem happens in any case.

Expected behavior
That number of generated tests would be 23:
13 for Cartoons
10 for Taxi

Actual behavior
Message says that only 3 tests are generated, while UTBot actually generated expected number of tests: 23.