Consolidate junit dependency in top pom.xml
Consolidate junit dependency in top pom.xml

It's incorrect junit dependency appears in both dependencies
and dependencyManagement sections. If it's only declared in
dependencyManagement section, all modules must declare use of
junit in its own depedencies section without version. As in
current code, none of the modules are declaring junit as dependency,
I decided to remove dependencyManagement, and put it in top
dependencies section with specific version and scope.

However, a better practice is still using dependencyManagement
in top pom.xml with proper version and scope and each module should
explicitly add this entry in dependencies section without specifying
the version. It gives the flexibility for an individual module
selectively take this dependency with overridable version or not
take it.

Change-Id: I7394a68426f19b6bafec9c84ff4e40c5a44d46d1

toliaqat/xenon,toliaqat/xenon,toliaqat/xenon,toliaqat/xenon,toliaqat/xenon