API calls throw AWS compatible exception

Fixes bug 1271529
Merge pull request #92 from ikhudoshyn/bug/1271529

API 'create_table' call throws AWS compatible exception
Added strong consistency for items reading in tempest tests.
Merge pull request #5 from Mirantis/master

Merge with upstream
Merge pull request #93 from yyekovenko/master

Added strong consistency for items reading in tempest tests.