Emit UtError when there are no beans for this instance during integration test generation

[IlyaMuravjov]

Description

Integration tests can't be generated when there are no beans for tested class, so we display an error.

How to test

Manual tests

Generate integration tests for AnimalService.getInjectedName() in TwoAnimals project using DolphinConfig, the following error should be reported, because DolphinConfig doesn't have any bean for AnimalService:

public void testGetInjectedName_errors() {
    // Couldn't generate some tests. List of errors:
    // 
    // 1 occurrences of:
    /* No beans of type org.example.service.AnimalService are found. Try choosing different
    Spring configuration or adding beans to org.example.DolphinConfig */

}

Self-check list

• I've set the proper labels for my PR (at least, for category and component).
• PR title and description are clear and intelligible.
• I've added enough comments to my code, particularly in hard-to-understand areas.
• The functionality I've repaired, changed or added is covered with automated tests.
• Manual tests have been provided optionally.
• The documentation for the functionality I've been working on is up-to-date.