[fuel -ci][python-fuelcient] verify-python-fuelclient job (for different branches) should run on different slaves

[Sergey Kulanov]

verify-python-fuelclient job [1], should run on different slaves for different python-fuelclient branches otherwise it fails. Example:

Job run [2] was for stable/mitaka branch and it fails:

Deleting the files.
functional runtests: commands[1] | bash /home/jenkins/workspace/verify-python-fuelclient/tools/prepare_nailgun.sh
Obtaining Nailgun with the revision stable/mitaka
Cloning into '/home/jenkins/workspace/verify-python-fuelclient/fuel-web'...

Switched to a new branch 'stable/mitaka'
Branch stable/mitaka set up to track remote branch stable/mitaka from origin.
Setting up database.
INFO [alembic.runtime.migration] Context impl PostgresqlImpl.
INFO [alembic.runtime.migration] Will assume transactional DDL.
ERROR [alembic.util.messaging] Can't locate revision identified by 'c6edea552f1e'
ERROR: InvocationError: '/bin/bash /home/jenkins/workspace/verify-python-fuelclient/tools/prepare_nailgun.sh'

The issue was resolved by cleaning VENV, please check [3].

So the solutions are:
1. Run jobs for different branches on different slaves
2. Clean VENV each time, before running tests

[1]. https://ci.fuel-infra.org/job/verify-python-fuelclient/
[2]. https://ci.fuel-infra.org/job/verify-python-fuelclient/2333/
[3]. https://ci.fuel-infra.org/job/verify-python-fuelclient/2337/

[Roman Vyalov (r0mikiam)]

will be fixed by docker