Merge branch 'unit_tests' into 'DEV'

Unit tests

See merge request !11
1 job from DEV in 48 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #1141
unittest

00:48

 
Test unittest
  File "/builds/RECIRCLE/interface-openstack/interface_openstack/test/test_image.py", line 9, in test_fields
image = Image('id', 'name', 'format')
TypeError: __init__() missing 1 required positional argument: 'size'

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Ran 11 tests in 0.015s

FAILED (errors=1)
ERROR: Job failed: exit code 1