Adapt docker tests (follow-up of PR-1366)
Merge pull request #1381 from benallard/docker_tests

Adapt docker tests (follow-up of PR-1366)
Enforce Property name and source as unicode or ascii string
Merge benallard/buildbot:properties_unicode (PR #1382)
Introduce the build_properties table
Fix ordering of buildslave and builder reconfig
fix pyflakes
Fix typo in parameter name.
Merge benallard/buildbot:patch-3 (PR #1383)
Add buildproperties db API
Merge pull request #1384 from benallard/build_properties_db

Build properties db
Don't allow non-JSON-able properties any more
Make pep8 happy
Merge pull request #1385 from benallard/no-json-no-property

Don't allow non-JSON-able properties any more