Added test for API mapping feature

Going to enable parameter mapping for API required parameters
(release_version, target, testset, product) so users can use terms that
make sense in their context when uploading reports. See issue #23
Define the mapping as hash
Changed tests a little

The previous test defined the mappings so that they would not work.
Added API parameter mapping

Added possibility to define custom names for API parameters
(release_version, target, testset, product). This enables user
organizations to use parameters that make sense in their context.

Closes #23
Added task for deploying config.yml