Alba 1.3.17

Bugfixes:

• command line interface: $(NAMESPACE) doesn't work here ( #735 )
• fix alba_osd disqualification due to race in message delivery ( #737 )
• don't leak fd if fsync fails ( #742 )
• decouple pool invalidation and retry strategy ( #596 )

Various:

• stabilize arakoon changes test ( #569 )
• cli to force preset propagation ( #752 )
• less license header bloat ( #743 )