Specify string format arguments as logging function parameters

This allows logging to be lazzy when possible. This error can be found easily
with pylint.

Change-Id: Ib14530e34b33dce466cc52f365e3df26d394c161
Fix indentation

Change-Id: I7b48480d3419784f841423ddf617e2021c969ee8
Remove parenthesis around yield parameter

Change-Id: Ie93fab8cab98273ac2b107e5649efc5920501819
Fix PEP8.

Helps to run unit tests with ./ci-run normally.

Change-Id: I43a55beeacb149d74e44074e3fcba7de5a1a8cbb
gitreview: Set correct review hostname.

  * The correct review instance is review.linaro.org, not
    git.linaro.org.

Change-Id: I6ea541741cd26077d163d0528c384ddf4d18b066
beaglebone-black: add correct testboot_offset

Change-Id: Ifa073383b0881b4f091df6c844cfbd454aa2493c
Multinode: is_slave bundle variable is a string

By definition in the bundle format, every fields in the attributes array should
be of type string.
We convert 'is_slave' to string to match this requirement.

Change-Id: I083af94c26e324cbf1a282e8a4f982d542802ca4
Multinode: move is_slave in the right section

Change-Id: I4624856342d45471b102a84e3c4c9bc9d5a71f9c
device: Handle empty boot command cases (bug 583).

  * Fix for bug 583 where Target is not handling empty boot
    commands list on preprocessing.
  * Add a general Target object test class to test the
    _boot_cmds_preprocessing method.

Change-Id: I0fcd0a40fdd379c42096a1bd0a8c1552e8fdfb15