Add os_distro and os_version in OpenStack images #1981

[micafer]

Add os_distro and os_version in OpenStack images

Description

Implements: #1981

Status

Replace this: describe the PR status. Examples:

• done, ready for review

Checklist (tick everything that applies)

• [x] Code linting (required, can be done after the PR checks)
• [ ] Documentation
• [x] Tests
• [x] ICLA (required for bigger changes)

[codecov-commenter]

Codecov Report

Merging #1982 (0ee184a) into trunk (6e39117) will increase coverage by 0.00%. The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk    #1982   +/-   ##
=======================================
  Coverage   83.20%   83.20%           
=======================================
  Files         353      353           
  Lines       81433    81435    +2     
  Branches     8593     8593           
=======================================
+ Hits        67751    67753    +2     
  Misses      10874    10874           
  Partials     2808     2808           

Files	Coverage Δ
libcloud/compute/drivers/openstack.py	84.93% <ø> (ø)
libcloud/test/compute/test_openstack.py	94.54% <100.00%> (+0.01%)	:arrow_up: