Maven scope in dependencyManagement

Currently the `commons-io` library is declared with a test scope in the `azure-parent` pom : https://github.com/Azure/azure-libraries-for-java/blob/master/pom.xml#L118

This just caused a rather hard to debug issue for one of my projects where another library used had `commons-io` as a compile dependency (not explicitly set at compile because it is the default), and importing the `azure-parent` "excluded" it, causing my project to fail at runtime.

Quick search shows it may not be a good idea to have scopes in ``, at least not "test" ([first answer I found on SO](https://stackoverflow.com/a/20750041)).

Would it be fair to remove the test scope from `` in `azure-parent`? I can provide the PR.

Öffne pom.xml ungefähr bei Zeile 118 und prüfe die commons-io-Deklaration unter dependencyManagement. Bestätige, dass der Test-Scope entfernt wurde, und verifiziere, dass der Parent commons-io nicht mehr als Testabhängigkeit überschreibt.

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