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.

118行目付近の pom.xml を開き、dependencyManagement 配下の commons-io 宣言を確認します。test スコープが削除されていることを確認し、parent が commons-io を test 依存関係として上書きしなくなっていることを検証します。

索引モデルが issue の本文から書いたものです。