Added tests with capacity (sample 7 and 8) and feature to read capacity from xml in VNTRequest.

- Sample7 is working fine.
- Sample8 is failing because current output does not match expected one.
Node mapping is different than expected and links are too.
Expectd output is stored in output.karaf file.
Current output is stored in output_current.karaf file.

Outputs are not displaying capacities, by now.
Merge pull request #564 from isartcanyameres/feature/vnmapper

Added tests with capacity (sample 7 and 8) and feature to read capacity ...