Release http conn. if error while getting response
Fixes Bug #3370
Conflicts:
kamaki/clients/connection/kamakicon.py version
Merge branch 'develop' of https://code.grnet.gr/git/kamaki into develop
Suggest ansicolors, progress when missing (#3367)
Fix typo in list images help output
Complete unittests for clients.image
unittest clients.image remove member
unittest clients.image add member
unittest clients.image list_members
unittest clients.image set members
unittest clients.image register, remove reregister
method reregister is obsolete and was removed from all kamaki hierarchy
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