Move test-runtime only dependencies out from the tycho-surefire-plugin

Since 0.21.0 [1], [2], test-runtime only dependencies must be placed
under target-platform-configuration/dependency-resolution/extraRequirements.

[1] http://wiki.eclipse.org/Tycho/Release_Notes/0.21#Test_Execution
[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=436617#c11