Two ngsi10 conv ops about subscriptions
Merge branch 'develop' into feature/conv_op_ngsi10_subscriptions_sid
'subscriptions' => 'contextSubscriptions' for ngsi10 conv ops. Harness test for ngsi10 contextSubscriptions conv op .
unit tests up at 100%
Merge pull request #135 from telefonicaid/feature/conv_op_ngsi10_subscriptions_sid

Feature/conv op ngsi10 subscriptions sid