Add a parameter enabling SSL when using CKAN
Update Cygnus version in the pom
Do the CKAN backend directly manages the HttpClient factory and client
Do the HDFS backend directly manages the HttpClient factory and client
Add a getter regarding the leased connections
Avoid the HDFS and CKAN sinks manage the HttpClient factory and client
Addapt the tests to the new HttpClient factory and client management policy
Fix issues raised during code review
Merge pull request #247 from telefonicaid/backlog/230

backlog/230