Update/improve client unittests
1. increase test_set_firewall_profile tollerance2. all options from config files3. let tests read options from custom config files
Clean-up and update comments in clients.utils
1. Remove deprecated or unused methods dict2file, list2file, prefix_keys
2. Rename and update comments to help sphinx create better documentation
Update docs and doc-parsed comments in storage
docs: replace Glance with Planktonstorage: standard sphincs-parsable comments
There are always some typos...
Update comment docs at pithos client
Change order of params for get_object_meta
Update comment docs for astakos client
Update comment docs for image client
Update comments cods for cyclades clients
Restructure cyclades client, update comment docs
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