[MSHADE-419] createDependencyReducedPom should not replace original pom when shadedArtifactAttached

[XN137]

Description:

The problem was introduced by MSHADE-321 in 3.3.0 because before,
the createDependencyReducedPom method was only ever called when
shadedArtifactAttached is false.

The createDependencyReducedPom method not only writes the dependency
reduced pom file but also modifies the current project to use it as
replacement for its original pom.
This has an effect on all maven build logic being executed afterwards.

Thus, in multi module builds, when a module attaches a shaded jar, its
non-shaded artifact no longer contains transitive dependencies when used
from other modules, even though the pom in its jar still declares them.

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[XN137]

@khmarbaise sorry for the ping, but whats the best way to find someone to review this? thank you

[gnodet]

The problem seems to have been fixed in 3.4.1 according to #162 which seems to pass on master.

[buyukim]

FYI, @gnodet, we are using 3.4.1, and this issue is NOT fixed (i.e., non-shaded pom excludes transitive compile dependencies)

[frant-hartm]

@gnodet the test here and in #162 is incomplete - it should also check what pom was installed into the local repository.