Update requirements

Remove all unneeded requirements, also remove some extra tox targets.
Make docs environment the default tox environment.

Add bindep.txt file so that only required packages get installed. Add
bindep environment for tox.ini.

Change-Id: I5792ebeea31b845ad732822ea1c8e8d9030d65c0

bindep.txt

@@ -0,0 +1,13 @@
+# This is a cross-platform list tracking distribution packages needed by tests;
+# see http://docs.openstack.org/infra/bindep/ for additional information.
+
+gettext
+libxml2-dev [platform:dpkg]
+libxml2-devel [platform:rpm]
+libxml2-utils [platform:dpkg]
+libxslt-devel [platform:rpm]
+libxslt1-dev [platform:dpkg]
+python-dev [platform:dpkg]
+python-lxml
+zlib-devel [platform:rpm]
+zlib1g-dev [platform:dpkg]

test-requirements.txt

@@ -2,13 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking<0.11,>=0.10.0
-
-coverage>=3.6
-python-subunit>=0.0.18
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 oslosphinx>=2.5.0 # Apache-2.0
-oslotest>=1.10.0 # Apache-2.0
-testrepository>=0.0.18
-testscenarios>=0.4
-testtools>=1.4.0

tox.ini

@@ -1,29 +1,29 @@
 [tox]
 minversion = 2.0
-envlist = py34,py27,pypy,pep8
+envlist = docs
 skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command =
+install_command = pip install -U {opts} {packages}
-                  pip install -U {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
-
-[testenv:pep8]
-commands = flake8 {posargs}
 
 [testenv:venv]
 commands = {posargs}
 
-[testenv:cover]
-commands = python setup.py test --coverage --testr-args='{posargs}'
-
 [testenv:docs]
 commands = python setup.py build_sphinx
 
+[testenv:bindep]
+# Do not install any requirements. We want this to be fast and work even if
+# system dependencies are missing, since it's used to tell you what system
+# dependencies are missing! This also means that bindep must be installed
+# separately, outside of the requirements files.
+deps = bindep
+commands = bindep test
+
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.