Merge pull request #89 from dukhlov/master

Create Table api method floating problem was fixed
Fix NULL and NOT_NULL conditions in 'scan'
Merge pull request #90 from ikhudoshyn/not-null-scan-fix

Fix NULL and NOT_NULL conditions in 'scan'
Fixed one of Scan tests.
Merge pull request #91 from yyekovenko/master

Fixed one of Scan tests.
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.
Check for table existence before create

Fixes bug 1271529
Merge pull request #94 from ikhudoshyn/bug/1271529

Check for table existence before create
unit tests are fixed, pep8 rules are satisfied