Align tox.ini and fix coverage jobs in jenkins.

The jenkins coverage jobs expect there to be a .coverage file, so deleting
it is a bad idea. Also, coverage erase will do that for us.
While we're in there, update tox.ini and setup.cfg to the latest.

Change-Id: Icd0a8fc66a5146e0d94f62a9f65a4536981d2916

.coveragerc

@@ -0,0 +1,6 @@
+[run]
+branch = True
+omit = /usr*,setup.py,*egg*,.venv/*,.tox/*,test/*
+
+[report]
+ignore-errors = True

setup.cfg

@@ -26,8 +26,6 @@ output_file = locale/swift.pot
 exe=1
 verbosity=2
 detailed-errors=1
-with-openstack=1
-openstack-red=0.05
-openstack-yellow=0.025
-openstack-show-elapsed=1
-openstack-color=1
+cover-package = swift
+cover-html = true
+cover-erase = true

tox.ini

@@ -2,43 +2,29 @@
 envlist = py26,py27,pep8
 
 [testenv]
+setenv = VIRTUAL_ENV={envdir}
+         NOSE_WITH_OPENSTACK=1
+         NOSE_OPENSTACK_COLOR=1
+         NOSE_OPENSTACK_RED=0.05
+         NOSE_OPENSTACK_YELLOW=0.025
+         NOSE_OPENSTACK_SHOW_ELAPSED=1
+         NOSE_OPENSTACK_STDOUT=1
 deps =
   -r{toxinidir}/tools/pip-requires
   -r{toxinidir}/tools/test-requires
-commands = nosetests test/unit []
+commands = nosetests test/unit {posargs}
+
+[tox:jenkins]
+downloadcache = ~/cache/pip
 
 [testenv:pep8]
-deps = pep8==0.6.1
+deps = pep8==1.1
 commands =
-  pep8 --repeat --show-pep8 --show-source swift tools setup.py
+  pep8 --repeat --show-source --exclude=.venv,.tox,dist,doc,test .
   pep8 --repeat --show-pep8 --show-source --filename=swift* bin
 
 [testenv:cover]
-commands =
-  coverage erase
-  nosetests test/unit --with-coverage --cover-html --cover-erase \
-    --cover-package=swift
-  /bin/rm -f .coverage
-
-[testenv:hudson]
-downloadcache = ~/cache/pip
+setenv = NOSE_WITH_COVERAGE=1
 
 [testenv:venv]
 commands = {posargs}
-
-[testenv:jenkins26]
-basepython = python2.6
-deps = file://{toxinidir}/.cache.bundle
-
-[testenv:jenkins27]
-basepython = python2.7
-deps = file://{toxinidir}/.cache.bundle
-
-[testenv:jenkinscover]
-deps = file://{toxinidir}/.cache.bundle
-commands =
-  nosetests test/unit --with-xcoverage --cover-erase --cover-package=swift
-
-[testenv:jenkinsvenv]
-deps = file://{toxinidir}/.cache.bundle
-commands = {posargs}