[MCOMPILER-474] - Also check jar files when determining if dependencies changed

[Powerrr]

https://issues.apache.org/jira/browse/MCOMPILER-474

If a dependency module has changed since last compilation and we run mvn package then dependent module doesn't get recompiled, because dependency is added to its compilePath as a .jar file, not as a classes directory.
This PR changes the logic in the isDependencyChanged() method so that it also checks jar files for modifications.
The integration test is mostly a copy of MCOMPILER-349_dependencyChanged, with a few tweaks.

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