fix test session finish with duplicated tests in suite

[tbicr]

For example fix situation when we repeat failed tests.
In this case tests and refined_tests have different size that will raise exception for tests[::-1] assignment.

[pupssman]

Makes sense. Plz fix integration test run -- AFAICS, they fail due to new checks in pep8

[tbicr]

@pupssman , I a bit confused, look like pep8 broken in master. Should I fix it in this commit or you can check that master already pass pep8?

[pupssman]

It would be great for you to fix pep8 issues currently present in master.

[pupssman]

Also, while you are here why not to look at #102 to earn lots of community karma points? Everybody strives for #101

[tbicr]

@pupssman , CI works too strange, added blank line broke tests for python2.7, flake8>=3.0.0 not support python2.6

[pupssman]

Wow, looks like a bug in CI config. Looks like we should not run flake8 per each environment, only once, with latest python.
Also, strange that memory consumption test failed.

[pupssman]

Sadly, I dont have much time to look into it now

[pupssman]

That does the job!

https://travis-ci.org/allure-framework/allure-python/jobs/177651437

GLOB sdist-make: /home/travis/build/allure-framework/allure-python/setup.py
py26 create: /home/travis/build/allure-framework/allure-python/.tox/py26
py26 installdeps: pytest, pytest-cov, pytest-xdist, pyhamcrest
py26 inst: /home/travis/build/allure-framework/allure-python/.tox/dist/pytest-allure-adaptor-1.7.5.zip
py26 installed: DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6,apipkg==1.4,argparse==1.4.0,coverage==4.2,enum34==1.1.6,execnet==1.4.1,lxml==3.6.4,namedlist==1.7,py==1.4.31,PyHamcrest==1.9.0,pytest==2.9.0,pytest-allure-adaptor==1.7.5,pytest-cov==2.4.0,pytest-xdist==1.15.0,six==1.10.0
py26 runtests: PYTHONHASHSEED='2418803278'
py26 runtests: commands[0] | coverage run --source=allure -m py.test tests/ --basetemp=/home/travis/build/allure-framework/allure-python/.tox/py26/tmp
============================= test session starts ==============================
platform linux3 -- Python 2.6.9, pytest-2.9.0, py-1.4.31, pluggy-0.3.1
rootdir: /home/travis/build/allure-framework/allure-python, inifile: 
plugins: allure-adaptor-1.7.5, xdist-1.15.0, cov-2.4.0
collected 252 items 
tests/test_attach.py ............................
tests/test_common.py ....

[pupssman]

LGTM
@mavlyutov plz take a look too

[mavlyutov]

looks good, thanks for contributing!

[pupssman]

@tbicr do you need that released soon?

[tbicr]

@pupssman , for me easily use pypi version instead github commit in requirements, so if you can make minor release it will be great!

[pupssman]

@tbicr will try 2 do it today

[pupssman]

@tbicr here ya go: https://pypi.python.org/pypi/pytest-allure-adaptor/1.7.6