Switch pip-missing-reqs for pip-check-reqs

pip-missing-reqs was renamed to pip-check-reqs, additionally,
we import from setuptools, so we should include it in our
requirements.txt

Change-Id: Ic963aa8056196d7e99c446f3e1156f05195aab62

requirements.txt

@@ -31,6 +31,7 @@ SQLAlchemy>=0.9.7,<=0.9.99
 sqlalchemy-migrate>=0.9.5
 stevedore>=1.3.0  # Apache-2.0
 suds-jurko>=0.6
+setuptools
 WebOb>=1.2.3
 dnspython>=1.12.0
 oslo.db>=1.7.0  # Apache-2.0

tox.ini

@@ -55,12 +55,12 @@ commands = bash -c "find {toxinidir}/contrib/devstack \
          \)                                           \ #   have no extension
          -print0 | xargs -0 bashate -v"
 
-[testenv:pip-missing-reqs]
+[testenv:pip-check-reqs]
 # do not install test-requirements as that will pollute the virtualenv for
 # determining missing packages
 # this also means that pip-missing-reqs must be installed separately, outside
 # of the requirements.txt files
-deps = pip_missing_reqs
+deps = pip-check-reqs
        -r{toxinidir}/requirements.txt
 commands=pip-missing-reqs -d --ignore-file=designate/tests/* designate