Revert "Do not include partest and it's dependencies in generated pom."

[gkossakowski]

This reverts commit 053193f merged in #7.

I misunderstood bevaior of test scope/configuration in relation to
transitive dependency. Partest can be included in generated pom as
long as it's declared to be in test scope. Therefore the changes
in 053193f are not needed.

[gkossakowski]

Review by @retronym.

[retronym]

LGTM.

Even though they don't cause any real problems, perhaps we should actually consider stripping out test-scoped from the POMs we publish for the modules. Why expose an implementation detail like the test framework we use in this artifact. It is pure noise for someone reading that file.

But if we do that, we should do it uniformly for all our modules with shared configuration in @jsuereth's proposed scala-module SBT plugin.

[gkossakowski]

@retronym: I agree. Actually, my idea was to try those techniques I introduced 053193f in the small and test them whether they work as expected. Once battle tested I was planning to codify them in sbt plugin.