Rebuild all Contest Estimator projects to provide only JDK 8 compatible code

[Domonion]

Description

Currently projects for Contest Estimator are build with unspecified dependencies versions. Some of them references code for JDK version > 8. When they are loaded/transformed/instrumented - code generation breaks and estimation become unprecise as the problem is not with UtBot, but with the way we provided that project.

It is required to remove JDK 8 incompatible dependencies in tested projects, rebuild them for JDK 8 and provide relevant information about building it.

Rebuilding and removing incompatible .jars would also allow collecting JaCoCo statistics.

Projects required to be rebuilt:

• fastjson-1.2.50
• spoon-core-7.0.0
• spoon
• seata-core-0.5.0
• guava-26.0
• guava-30.0
• guava

[Domonion]

spoon-core-7.0.0 is issued in #1682 - fixed with #1691

[Domonion]

fastjson-1.2.50 is fixed with #1692