ref 12742: DataMiner - Support Python 3.6

https://support.d4science.org/issues/12742

Python3.6 added

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/data-analysis/dataminer-pool-manager@173835 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/dataanalysis/dataminer/poolmanager/ansiblebridge/AnsibleBridge.java

@@ -285,6 +285,7 @@ public class AnsibleBridge {
   /**
    * Generate all roles for this dependency
    * @param dep Dependency
+   * @return Collection of Roles
    */
   public Collection<Role> generateRoles(Dependency dep) {
     Collection<Role> roles = new Vector<>();