Merge pull request #17 from telefonicaid/feature/IOTCORE-112_Integration

Feature/iotcore 112 integration
ADD Convenience operation support
ADD Error object instead of string description
FIX Errors detected by Sonar
ADD Tests for unknown operations
ADD Tests for Keystone Proxy errors
ADD Test case definition
FIX reduce the number of regexes
Merge pull request #18 from telefonicaid/feature/IOTCORE-111_convenience_tasks

Feature/iotcore 111 convenience tasks
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
FIX Multiple callbacks on XML error
ADD Validation against the Keystone Proxy