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What was done:
1) Findbugs upgraded to 3.0.0
2) IncompatibleClassChangeError fixed (by migration to ASM5)
3) DependenciesValidator is broken since it uses ASM3

To see the result we need to release new plugin version, but this will brake DependenciesValidator, so we need to solve the the issue before (puzzle was added to qulice-maven-plugin pom)

This pull request also fixes the issue #209 as it upgrades Findbugs