Clean-up dependencies.

Requirements were specified in both requirements.txt and setup.py:
- setup.py should be used, as that's what pip looks at when installing
  this as a dependency of something else.

Test requirements where specified in both test-requirements.txt and
setup.py:
- test-requirements.txt should be used, as tox cannot cleanly use
  setup.py for this: tox-dev/tox#13

Change-Id: I0240e16510c2f2cd2c8628aa26c8332f43590faa

Author: Stephen Shirley

requirements.txt

@@ -11,14 +11,9 @@
     ),
     install_requires=[
         'pymysql>=0.9.3',
-        'tabulate',
+        'tabulate>=0.8.2',
         'cumin'
     ],
-    tests_require=[
-        'flake8',
-        'nose',
-        'coverage',
-    ],
     entry_points={
         'console_scripts': [
             # cli_admin

setup.py

@@ -10,8 +10,7 @@ envlist = flake8, unit
 basepython = python3
 # All test environments share the same virtual env
 envdir = {toxworkdir}/venv
-deps = -rrequirements.txt
-       -rtest-requirements.txt
+deps = -rtest-requirements.txt
 
 [testenv:flake8]
 commands = flake8 {posargs}