FIX Errors detected by Sonar
ADD Tests for unknown operations
ADD Tests for Keystone Proxy errors
ADD Test case definition
Merge branch 'develop' of github.com:telefonicaid/fiware-orion-pep into feature/IOTCORE-113_Clean_code
ADD Tests for wrong XML Payloads received
Merge pull request #19 from telefonicaid/feature/IOTCORE-113_Clean_code

Feature/iotcore 113 clean code