Fix itest_lucid

[chriskuehl]

Closes #94

now with 37% less Makefile!

[asottile]

circle seems failing, flake or real? I tried looking at the log and it's not obvious where it's failing (or I'm not quite clever enough to see it!)

[chriskuehl]

@asottile yeah, the Circle logs are really hard to interpret :\ (you have to check all four workers and Ctrl-F for "failed" since it might not be at the bottom).

It's not a flake, though -- it happens with make itest_trusty locally too:

Collecting pre-commit>=0.5.0 (from -r requirements-dev.txt (line 2))
  Downloading pre_commit-0.8.2-py2.py3-none-any.whl (102kB)
Collecting pytest (from -r requirements-dev.txt (line 3))
  Downloading pytest-2.9.2-py2.py3-none-any.whl (162kB)
Collecting pytest-timeout (from -r requirements-dev.txt (line 4))
  Downloading pytest_timeout-1.0.0-py2.py3-none-any.whl
Collecting funcsigs>=1; python_version < "3.3" (from mock->-r requirements-dev.txt (line 1))
  Downloading funcsigs-1.0.2-py2.py3-none-any.whl
Collecting six>=1.9 (from mock->-r requirements-dev.txt (line 1))
  Downloading six-1.10.0-py2.py3-none-any.whl
Collecting pbr>=0.11 (from mock->-r requirements-dev.txt (line 1))
  Downloading pbr-1.10.0-py2.py3-none-any.whl (96kB)
Collecting pyyaml (from pre-commit>=0.5.0->-r requirements-dev.txt (line 2))
  Downloading PyYAML-3.11.zip (371kB)
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 299, in run
    requirement_set.prepare_files(finder)
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 370, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 601, in _prepare_file
    abstract_dist.prep_for_dist()
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 127, in prep_for_dist
    self.req_to_install.run_egg_info()
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 397, in run_egg_info
    self.setup_py, self.name,
  File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 372, in setup_py
    import setuptools  # noqa
  File "/usr/local/lib/python2.7/dist-packages/setuptools/__init__.py", line 14, in <module>
    from setuptools.extension import Extension
  File "/usr/local/lib/python2.7/dist-packages/setuptools/extension.py", line 11, in <module>
    from . import msvc
  File "/usr/local/lib/python2.7/dist-packages/setuptools/msvc.py", line 244, in <module>
    class PlatformInfo:
  File "/usr/local/lib/python2.7/dist-packages/setuptools/msvc.py", line 253, in PlatformInfo
    current_cpu = safe_env['processor_architecture'].lower()
  File "/usr/lib/python2.7/UserDict.py", line 23, in __getitem__
    raise KeyError(key)
KeyError: 'processor_architecture'
Makefile:136: recipe for target '_itest_deb-ubuntu-trusty' failed
make: *** [_itest_deb-ubuntu-trusty] Error 2

Pretty weird traceback! (I didn't really look into it yet.)