fog-core 2+ support to refactor namespace and clear deprecation messages

[gildub]

We now support fog-core 2+ meanwhile we need to re-factor in order to properly align with it.

All deprecation messages such as:

[fog][DEPRECATION] The format Fog::Compute::OpenStack is deprecated
[fog][DEPRECATION] Unable to require fog/openstack/compute

require to change all Namespace from Fog::<Service Name>::OpenStack to Fog::OpenStack::<Service Name>

[stiller-leser]

Would it be possible to set a less strict fog dependency, i.e. 2.1.0? I know this is an ancient version, but the deprecation warnings introduced into fog-core in september break a lot tests. Same is currently happening with fog-google.

Also thanks for the great work! It is highly appreciated.

[gildub]

@stiller-leser,

Thanks for your feedback.
Instead of procrastinate I burned few cycles and did that today, not very exciting but DONE!
As soon as #432 is merged we'll release.

[ymasson]

thanks a lot @gildub

[gildub]

@stiller-leser, @ymasson, version 0.3.1 is now available.