CNI class is moved to lib folder and the class is only
instantiated and called. All the function and functionalities
are properly tested.
Moved gen_mac and mac_to_ipv6_link_local functions to
rhizome/common/lib because vm_setup.rb and CNI uses these
functions. Duplicate definition of this function is removed from CNI
Co-authored-by: Eren Başak <eren@ubicloud.com>
Co-authored-by: mohi-kalantari <mohi.kalantari1@gmail.com>
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