[SPARKL-73] - Fixed roles parameter to encode arrays as a JSON string
[SPARKL-73] - Added test
Merge pull request #24 from marcovala/master

[SPARKL-73] - Fixed roles parameter to encode arrays as a JSON string
[SPARKL-73] - Added missing test resource
Merge pull request #26 from marcovala/master

[SPARKL-73] - Added missing test resource