setup,py,requirements.txt: add pytest

pytest requires pluggy >= 0.7, while we always use pluggy 0.6, as
specified by requirements.txt. as this version is good enough for
tox. but in tox.ini, we do use pytest, and no version is specified,
so we have good chance running into pytest-dev/pytest#3753

Signed-off-by: Kefu Chai <[email protected]>

Author: tchaikov

requirements.txt

@@ -9,6 +9,8 @@ apache-libcloud==1.5.0
 appdirs==1.4.3            # via os-client-config
 argparse==1.4.0
 asn1crypto==0.22.0        # via cryptography
+atomicwrites==1.1.5       # via pytest
+attrs==18.1.0             # via pytest
 babel==2.4.0              # via osc-lib, oslo.i18n, python-cinderclient, python-glanceclient, python-neutronclient, python-novaclient, python-openstackclient
 backports.ssl-match-hostname==3.5.0.1
 beanstalkc==0.4.0
@@ -27,7 +29,7 @@ deprecation==1.0          # via openstacksdk
 docopt==0.6.2
 enum34==1.1.6             # via cryptography
 first==2.0.1              # via pip-tools
-funcsigs==1.0.2           # via debtcollector, oslo.utils
+funcsigs==1.0.2           # via debtcollector, oslo.utils, pytest
 functools32==3.2.3.post2  # via jsonschema
 gevent==1.2.1
 greenlet==0.4.12          # via gevent
@@ -40,10 +42,10 @@ jsonpatch==1.15           # via warlock
 jsonpointer==1.10         # via jsonpatch
 jsonschema==2.6.0         # via warlock
 keystoneauth1==2.19.0     # via openstacksdk, os-client-config, osc-lib, python-cinderclient, python-glanceclient, python-keystoneclient, python-neutronclient, python-novaclient, python-openstackclient
-libvirt-python
 manhole==1.3.0
 markupsafe==1.0           # via jinja2
 monotonic==1.3            # via oslo.utils
+more-itertools==4.3.0     # via pytest
 msgpack-python==0.4.8     # via oslo.serialization
 mysql-python==1.2.3
 ndg-httpsclient==0.4.2
@@ -58,19 +60,21 @@ oslo.i18n==3.15.0         # via osc-lib, oslo.config, oslo.utils, python-cinderc
 oslo.serialization==2.18.0  # via python-keystoneclient, python-neutronclient, python-novaclient
 oslo.utils==3.25.0        # via osc-lib, oslo.serialization, python-cinderclient, python-glanceclient, python-keystoneclient, python-neutronclient, python-novaclient, python-openstackclient
 paramiko==2.1.2
+pathlib2==2.3.2           # via pytest
 pbr==2.0.0                # via cliff, debtcollector, keystoneauth1, openstacksdk, osc-lib, oslo.i18n, oslo.serialization, oslo.utils, positional, python-cinderclient, python-glanceclient, python-keystoneclient, python-neutronclient, python-novaclient, python-openstackclient, requestsexceptions, stevedore
 pexpect==4.2.1
 pip-tools==1.10.1
-pluggy==0.6.0             # via tox
+pluggy==0.7.1             # via pytest, tox
 positional==1.1.1         # via keystoneauth1, python-keystoneclient
 prettytable==0.7.2
 psutil==5.2.2
 ptyprocess==0.5.1         # via pexpect
-py==1.5.3                 # via tox
+py==1.5.3                 # via pytest, tox
 pyasn1==0.2.3
 pycparser==2.17           # via cffi
 pyopenssl==16.2.0
 pyparsing==2.2.0          # via cliff, cmd2, oslo.utils
+pytest==3.7.1
 python-cinderclient==2.0.1  # via python-openstackclient
 python-dateutil==2.6.0
 python-glanceclient==2.6.0  # via python-openstackclient
@@ -84,6 +88,7 @@ raven==6.0.0
 requests==2.12.5
 requestsexceptions==1.2.0  # via os-client-config
 rfc3986==0.4.1            # via oslo.config
+scandir==1.8              # via pathlib2
 simplejson==3.10.0        # via osc-lib, python-cinderclient, python-neutronclient, python-novaclient
 six==1.10.0
 stevedore==1.21.0         # via cliff, keystoneauth1, openstacksdk, osc-lib, oslo.config, python-keystoneclient

setup.py

@@ -63,6 +63,7 @@
                       'httplib2',
                       'paramiko',
                       'pexpect',
+                      'pytest', # for tox.ini
                       'nose', # for qa/tasks/rgw_multisite_tests.py',
                       'requests != 2.13.0',
                       'raven',