replace string format arguments with function parameters

There are files containing string format arguments inside
logging messages. Using logging function parameters should
be preferred.

Change-Id: Ia2c4540b8db38ec86ecd8cb4b7882780d164498d
Adds gag on put_item request with return_values ALL_OLD

Related to bug: #1299037
Change-Id: I3bff05da04372e04a2278af5b009dda09b16d739
Fixes bug with query request body validation

Now one or two non set attributes are required in key_conditions on
validation stage.

Closes-bug: #1295654
Change-Id: I47a94ddd3b636b0fd7bd03ec3361cd8d27ce015a
Fix put item with blob attr test

Also a lot of put item tests were moved to stable branch

Change-Id: I7288fa1b58dac1b6277956806617114805974b79
Closes-Bug: #1298613
Merge "Fixes bug with query request body validation"
Merge "Fix put item with blob attr test"
Merge "Adds gag on put_item request with return_values ALL_OLD"
Merge "replace string format arguments with function parameters"
Moves some tempest test to stable directory

Implements: bp review-tempest-tests
Change-Id: I0e7b85c42fe0eada071f7c765bb9acf2fea240a0
PoC Bulk data load over network

Implemented server and client for data uploading
via streaming HTTP POST request

Partially implements: bulk-data-load-over-network

Change-Id: I2705ca6f8d4c5b9d7b800028b3678d49890724d7