NEW: added Pilot Command for 1800 seconds timespan
FIX: added PilotAgentsDB to CacheFeeder agent
NEW: refurbished PilotCommand
FIX: shorter reason for the AlwaysX policies
NEW: added PilotInstantEfficiency to Configurations
NEW: refurbished PilotsCache to store different statuses and the
timespan
NEW: getPilotsSummaryShort method, which is a faster implementation of
getPilotsSummary
NEW: PilotsEfficiencyPolicy
FIX: added docstrings
FIX: added PilotDB to clients to avoid many connections
FIX: minor bugfixes
Merge pull request #1479 from ubeda/NEW_RSS_PilotsPolicy

[v7r0] NEW: RSS Pilots Efficiency Policy