Remove unnecessary pyNN testenv sections

According to [1], the pyNN factors automatically set basepython
unless explicitly requested otherwise.
This patch moves 'commands' attribute up into the 'testenv' section,
"testenv:pyNN" sections are unnecessary and also should be removed.

[1] https://github.com/tox-dev/tox/issues/477

Change-Id: I535188debcf89c91c887d0026bbf2157333ae2a4

tox.ini

@@ -11,6 +11,7 @@ setenv =
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 whitelist_externals = bash
+commands = stestr run --black-regex ".tests.functional" {posargs}
 
 [tox:jenkins]
 downloadcache = ~/cache/pip
@@ -23,15 +24,6 @@ commands = flake8
 basepython = python3
 commands = {posargs}
 
-[testenv:py27]
-commands =
-    stestr run --black-regex ".tests.functional" '{posargs}'
-
-[testenv:py35]
-basepython = python3
-commands =
-    stestr run --black-regex ".tests.functional" '{posargs}'
-
 [testenv:functional]
 basepython = python2.7
 setenv =
@@ -39,14 +31,6 @@ setenv =
 commands =
     stestr run --black-regex ".tests.unit" '{posargs}'
 
-[testenv:cover]
-basepython = python3
-commands =
-  coverage erase
-  python setup.py testr --coverage --testr-args='--concurrency=1 {posargs}'
-  coverage combine
-  coverage html --include='os_vif/*' -d covhtml -i
-
 [testenv:docs]
 basepython = python3
 commands = python setup.py build_sphinx
@@ -91,5 +75,3 @@ deps =
   -c{toxinidir}/lower-constraints.txt
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
-commands =
-    stestr run --black-regex ".tests.functional" '{posargs}'