UI. Default Test source root in Gradle project #786

Description

Test source root in current module must be set as default.

To Reproduce

Steps to reproduce the behavior:

1. IntelliJ IDEA 2022.1.4 is opened with one of the latest UTBot builds installed
2. UTBotJava project should be opened
3. Find a class in utbot-sample module
4. Open Generating tests with UTBot... for this class
5. Check Test source root field

Expected behavior

.../utbot-sample/src/test/java should be seleted by default

Actual behavior

The first test source root in the list is selected by default, now it's ".../utbot-summary/src/test/java"

Visual proofs (screenshots, logs, images)

Environment

Substitute this text with an information that can help us to recreate the environment. For instance, specify Java version, test framework with a version (JUnit, TestNG...), Mockito configuration (packages, classes, statics), were the test parametrized or not and so on.

Additional context

Related to #549 #577