FIX: removed shifterProxy from agents. It does not apply as we thought.
FIX: added unique thread Id on InspectorAgents
NEW: added Always{Degraded,Probing,Banned} policies. Always Banned can
be very useful if we want to keep something ALWAYS down.
FIX: missing commas
Merge pull request #1242 from ubeda/ElementInspectorAgentTunning

[v6r7] NEW: Element inspector agent tunning