Switch from testr to pytest in shotgun

testr is simply bad.

Also upgraded some of the test dependencies to
recent versions.

Change-Id: I822d6806d02539b34243775db3cf6bb1a9851ae8

.coveragerc

@@ -0,0 +1,3 @@
+[run]
+branch = True
+omit = shotgun/test/*

test-requirements.txt

@@ -1,5 +1,4 @@
-hacking>=0.8.0,<0.9
-mock==1.0.1
-testrepository>=0.0.18
-unittest2
-discover
+mock==1.3.0
+unittest2==1.1.0
+pytest==2.8.0
+pytest-cov==2.1.0

tox.ini

@@ -9,7 +9,7 @@ install_command = pip install --allow-external -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
 commands =
-    python setup.py testr --slowest --testr-args='{posargs:}'
+    py.test -vv {posargs:shotgun/test}
 
 [tox:jenkins]
 downloadcache = ~/cache/pip
@@ -23,7 +23,7 @@ commands =
 [testenv:cover]
 setenv = VIRTUAL_ENV={envdir}
 commands =
-    python setup.py testr --coverage {posargs:shotgun}
+    py.test -vv --cov=shotgun {posargs:shotgun/test}
 
 [testenv:venv]
 commands = {posargs:}