As you could see this ohai version is repackaged again and again from ancient ages.
http://mirror.fuel-infra.org/fwm/7.0/centos/os/x86_64/Packages/rubygem-ohai-6.14.0-1.el6.mira2.noarch.rpm http://mirror.fuel-infra.org/fwm/6.1/centos/os/x86_64/Packages/rubygem-ohai-6.14.0-1.el6.noarch.rpm http://mirror.fuel-infra.org/fwm/6.0/centos/os/x86_64/Packages/rubygem-ohai-6.14.0-1.el6.noarch.rpm http://mirror.fuel-infra.org/fwm/5.1/centos/os/x86_64/Packages/rubygem-ohai-6.14.0-1.el6.noarch.rpm http://mirror.fuel-infra.org/fwm/5.0/centos/os/x86_64/Packages/rubygem-ohai-6.14.0-1.el6.noarch.rpm
You probably should verify again all installation possible starting from 5.0
As you could see this ohai version is repackaged again and again from ancient ages.
http:// mirror. fuel-infra. org/fwm/ 7.0/centos/ os/x86_ 64/Packages/ rubygem- ohai-6. 14.0-1. el6.mira2. noarch. rpm mirror. fuel-infra. org/fwm/ 6.1/centos/ os/x86_ 64/Packages/ rubygem- ohai-6. 14.0-1. el6.noarch. rpm mirror. fuel-infra. org/fwm/ 6.0/centos/ os/x86_ 64/Packages/ rubygem- ohai-6. 14.0-1. el6.noarch. rpm mirror. fuel-infra. org/fwm/ 5.1/centos/ os/x86_ 64/Packages/ rubygem- ohai-6. 14.0-1. el6.noarch. rpm mirror. fuel-infra. org/fwm/ 5.0/centos/ os/x86_ 64/Packages/ rubygem- ohai-6. 14.0-1. el6.noarch. rpm
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You probably should verify again all installation possible starting from 5.0