Optimize username aquisition in image list
Refs: #4228
Collect all uuids and get them with one request
Augment user info in image list
Add --property to image list
Refs: #4220
Also, fix various bugs introduced by utils re-writtings
Fix division by 0 bug
Merge branch 'feature-clitests-utils' into develop
Complete cli.utils unittests
Refs: #4058
Test kamaki.cli.utils up to print_items
Unittest print_dict + print_list
Create a kamaki.cli.utils package
Refs: #4059
Initialize tests for kamaki.cli.utils
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