Unable to read test.conf while executing unit test

Problem:
root@jk:# tox -e py27
py27 create: /home/jk/Desktop/swift_code/swift_j/swift/.tox/py27
py27 installdeps: -r/home/jk/Desktop/swift_code/swift_j/swift/requirements.txt, -r/home/jk/Desktop/swift_code/swift_j/swift/test-requirements.txt
py27 develop-inst: /home/jk/Desktop/swift_code/swift_j/swift
py27 installed: appdirs==1.4.0,Babel==2.2.0,bandit==0.17.3,cffi==1.5.0,coverage==4.0.3,debtcollector==1.2.0,dnspython==1.12.0,docutils==0.12,eventlet==0.18.1,extras==0.0.3,fixtures==1.4.0,flake8==2.2.4,funcsigs==0.4,futures==3.0.4,gitdb==0.6.4,GitPython==1.0.1,greenlet==0.4.9,hacking==0.10.2,iso8601==0.1.11,Jinja2==2.8,keystoneauth1==2.2.0,linecache2==1.0.0,MarkupSafe==0.23,mccabe==0.2.1,mock==1.3.0,monotonic==0.6,msgpack-python==0.4.7,netaddr==0.7.18,netifaces==0.10.4,nose==1.3.7,nosehtmloutput==0.0.5,nosexcover==1.0.10,os-testr==0.6.0,oslo.config==3.5.0,oslo.i18n==3.2.0,oslo.serialization==2.2.0,oslo.utils==3.4.0,oslosphinx==4.2.0,PasteDeploy==1.5.2,pbr==1.8.1,pep8==1.5.7,prettytable==0.7.2,pycparser==2.14,PyECLib==1.2.0,pyflakes==0.8.1,Pygments==2.1,pyrsistent==0.11.12,python-keystoneclient==2.1.2,python-mimeparse==1.5.1,python-subunit==1.2.0,python-swiftclient==2.7.0,pytz==2015.7,PyYAML==3.11,requests==2.9.1,six==1.10.0,smmap==0.9.0,Sphinx==1.1.3,stevedore==1.10.0,-e git+https://git.openstack.org/openstack/swift@87fc21c7cfcce2a3e23a84fddcfd1309cd884716#egg=swift-master,testrepository==0.0.20,testtools==2.0.0,traceback2==1.4.0,unittest2==1.1.0,wheel==0.24.0,wrapt==1.10.6,xattr==0.7.8
py27 runtests: PYTHONHASHSEED='365979862'
py27 runtests: commands[0] | nosetests test/unit
Unable to read test config /etc/swift/test.conf - file not found

Solution:
1) We could make a dummy directory before starting the tests
2) Remove the path which is being checked i.e /etc/swift/test.conf which is of no use in current scenario also, as the path could be fetched from env variables also.

Code:
test/unit/__init__.py --> from test import get_config --> from swift.common.utils import readconf