Merge branch 'generalize-openstack-tutorial' into 'master'

Generalize openstack tutorial

See merge request !16
7 jobs for master in 2 minutes and 8 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
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apt

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cloudlab

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emulab

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phantomnet

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powder

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  Deploy
passed #2469
pages

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passed pages:deploy

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