Update git submodules
* Update docs/submodules/yardstick from branch 'master'
- Merge "Run tests in yardstick/tests/"
- Run tests in yardstick/tests/
* Edit .testr.conf and tools/run_tests.sh
* Run functional and unit tests in tests/ and yardstick/tests/
* Add yardstick/tests/unit/__init__.py and yardstick/tests/__init__.py
* Update pylintrc rules to disable:
* missing-docstring
* fixme
* protected-access
Test will run in both tests/ and yardstick/tests/ initially
Change-Id: Iccd0df0d1b85b5d08f7faa56669bc32687925f7e
JIRA: YARDSTICK-837
Signed-off-by: Emma Foley <emma.l.foley@intel.com>