Milestone libIGCM_v2.5 metrics

Tag libIGCM_v2.5. This version brings several bug fixes and paves the road towards metrics handling within libIGCM.

• On Ada : restarting from tar files was broken due to uncommunicated system change
• On Curie : remove usage of tmpfile_$$ causing spurious failure due to filesystem instability
• On Curie : we need to "/bin/sync" once per rebuild job to avoid potential empty blocks in the resulting files
• On Curie : we now rebuild on standard node using RAM high speed disk partition ; 250GB/node. Much faster
• On Curie : when using gencmip6 allocation ins_job will choose appropriate post-processing nodes
• On obelix : fix big brother behavious on this machine. Way too many messages were sent from this machine
• Fix cdo call. cdo produced segfault when yearly averaging netcdf4 files
• Some issues fixed with Big Brother. Smaller messages are sent. Less messages are sent.
• Enhanced headers and comments

Tickets solved: http://forge.ipsl.jussieu.fr/libigcm/query?status=closed&group=resolution&milestone=libIGCM_v2.5+metrics

Full changelog: http://forge.ipsl.jussieu.fr/libigcm/log/trunk/libIGCM?action=stop_on_copy&mode=stop_on_copy&rev=1167&stop_rev=1142&limit=100&verbose=on

Next release will continue to focus on metrics. Tickets can be consulted there : ​https://forge.ipsl.jussieu.fr/libigcm/query?status=assigned&status=new&status=reopened&group=status&milestone=libIGCM_v2.6+metrics