RunningPood SubmitPool parameter to VM contex allowing multiple VO support

NEW ssh contextualization for SubmitPool parameter, so it can support multiple VO and multiple groups VMs specifics with the corresponding CS setup
          Integrated in opennebula HEPiX & generic ssh contextualization
NEW Running VM plots by RuningPod & by DIRAC Image
NEW One DIRAC-context script for each cloud global defaults definition:
          generic-DIRAC-context pointing to dirac.pic.es (developing)
          EGI-Fedcloud-generic-DIRAC-context pointing to dirac.ub.es (multiple VO: testcloud, EGI Fedcloud)