Strasbourg site creation

This merge request add Strasbourg to the reference repository.

assigned to @pijacquo

added 33 commits

• 3f1fe238...8a5d3bd2 - 23 commits from branch master
• 75e713e9 - [strasbourg] site creation
• 3562767e - fix typo
• e1c86b12 - fix error with VM frontal name
• eda0434f - rename cluster name
• 4d0cf89d - add IPv6 site configuration
• 185bb936 - add ipv4 sites_offsets
• 1b1a9713 - add cluster fleckenstein initial description
• f3fc7e89 - fix typo for networks directory
• 1883bce7 - remove fleckenstein cluster
• cb1a2cd4 - initial ref api json files

Compare with previous version

merged

mentioned in commit d4139f6a