Remove customized pyX.Y tox requirements

Instead of having custom pyX.Y that test a specific set of
requirements and similar with other tox envs, just enable
more test-requirements directly, in a later change we will
use environment markers to denote the differences.

Also tweaks the jobboard example to bypass/hack a needed eventlet
fix into it so that it actually runs without breaking/never finishing.
A TODO note has been left to eventually (someday?) remove this hack
when it is no longer needed.

Part of fix for bug 1445827

Change-Id: I0fb669f0bdfbe4fe81d89234173f2c3ac4d06de6

taskflow/examples/jobboard_produce_consume_colors.py

@@ -30,6 +30,7 @@ top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                        os.pardir))
 sys.path.insert(0, top_dir)
 
+import six
 from six.moves import range as compat_range
 from zake import fake_client
 
@@ -150,6 +151,14 @@ def producer(ident, client):
 
 
 def main():
+    if six.PY3:
+        # TODO(harlowja): Hack to make eventlet work right, remove when the
+        # following is fixed: https://github.com/eventlet/eventlet/issues/230
+        from taskflow.utils import eventlet_utils as _eu  # noqa
+        try:
+            import eventlet as _eventlet  # noqa
+        except ImportError:
+            pass
     with contextlib.closing(fake_client.FakeClient()) as c:
         created = []
         for i in compat_range(0, PRODUCERS):

test-requirements.txt

@@ -16,17 +16,13 @@ zake>=0.1.6 # Apache-2.0
 kazoo>=1.3.1,!=2.1
 
 # Used for testing database persistence backends.
-#
+SQLAlchemy>=0.9.7,<=0.9.99
-# NOTE(harlowja): SQLAlchemy isn't listed here currently but is
-# listed in our tox.ini files so that we can test multiple varying SQLAlchemy
-# versions to ensure a wider range of compatibility.
-#
-# Explict mysql drivers are also not listed here so that we can test against
-# PyMySQL or MySQL-python depending on the python version the tests are being
-# ran in (MySQL-python is currently preferred for 2.x environments, since
-# it has been used in openstack for the longest).
 alembic>=0.7.2
 psycopg2
+PyMySQL>=0.6.2
+
+# Used for making sure we still work with eventlet.
+eventlet>=0.17.3
 
 # Docs build jobs need these packages.
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3

tox.ini

@@ -62,28 +62,10 @@ import_exceptions = six.moves
     taskflow.test.mock
     unittest.mock
 
-# NOTE(imelnikov): pyXY envs are considered to be default, so they must have
-# richest set of test requirements
-[testenv:py26]
-basepython = python2.6
-deps = {[testenv]deps}
-    MySQL-python
-    eventlet>=0.15.1
-    SQLAlchemy>=0.7.8,<=0.8.99
-
 [testenv:py27]
 deps = {[testenv]deps}
-    MySQL-python
-    eventlet>=0.15.1
-    SQLAlchemy>=0.7.8,<=0.9.99
     doc8
 commands = 
     python setup.py testr --slowest --testr-args='{posargs}'
     sphinx-build -b doctest doc/source doc/build
     doc8 doc/source
-
-[testenv:py34]
-deps = {[testenv]deps}
-    SQLAlchemy>=0.7.8,<=0.9.99
-    PyMySQL>=0.6.2
-