enable fibonacci integration test

[volodya-lombrozo]

I see the following in the eo-maven-plugin/pom.xml:

      <plugin>
        <artifactId>maven-invoker-plugin</artifactId>
        <configuration combine.self="override">
          <skipInstallation>${skipITs}</skipInstallation>
          <skipInvocation>${skipITs}</skipInvocation>
          <pomExcludes>
            <exclude>fibonacci/pom.xml</exclude>
          </pomExcludes>
        </configuration>
      </plugin>

As you can see, the fibonacci integration test is disabled. There is no comments regarding it. I believe we either should enable this test, or at least add a comment (todo) which would explain the reason.

[volodya-lombrozo]

@yegor256 @maxonfjvipon what do you think?