Upgrading 19.4 -> 19.6 breaks pyramid_mako tests

Originally reported by: iElectric (Bitbucket: iElectric, GitHub: Unknown)

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ERROR: test_directories_list (pyramid_mako.tests.Test_parse_options_from_settings)
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Traceback (most recent call last):
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/tests.py", line 141, in test_directories_list
    result = self._callFUT(settings)
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/tests.py", line 118, in _callFUT
    self.config.maybe_dotted)
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/__init__.py", line 175, in parse_options_from_settings
    directories = [abspath_from_asset_spec(d) for d in directories]
  File "/nix/store/00j1pcy46fq4pg1mdb5f7vwr4djrln34-python2.7-pyramid-1.5.8/lib/python2.7/site-packages/pyramid/asset.py", line 43, in abspath_from_asset_spec
    return pkg_resources.resource_filename(pname, filename)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1153, in resource_filename
    self, resource_name
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1854, in get_resource_filename
    "resource_filename() only supported for .egg, not .zip"
NotImplementedError: resource_filename() only supported for .egg, not .zip

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ERROR: test_multiple_registration_different_name (pyramid_mako.tests.Test_parse_options_from_settings)
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Traceback (most recent call last):
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/tests.py", line 239, in test_multiple_registration_different_name
    result = self._callFUT(settings)
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/tests.py", line 118, in _callFUT
    self.config.maybe_dotted)
  File "/tmp/nix-build-python2.7-pyramid_mako-0.3.1.drv-0/pyramid_mako-0.3.1/pyramid_mako/__init__.py", line 175, in parse_options_from_settings
    directories = [abspath_from_asset_spec(d) for d in directories]
  File "/nix/store/00j1pcy46fq4pg1mdb5f7vwr4djrln34-python2.7-pyramid-1.5.8/lib/python2.7/site-packages/pyramid/asset.py", line 43, in abspath_from_asset_spec
    return pkg_resources.resource_filename(pname, filename)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1153, in resource_filename
    self, resource_name
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1854, in get_resource_filename
    "resource_filename() only supported for .egg, not .zip"
NotImplementedError: resource_filename() only supported for .egg, not .zip

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Ran 63 tests in 0.155s

• Bitbucket: https://bitbucket.org/pypa/setuptools/issue/490

Start by reproducing test_directories_list and test_multiple_registration_different_name from pyramid_mako/tests.py, then trace the failure through parse_options_from_settings and pkg_resources.resource_filename as shown. Done means these tests pass when upgrading from 19.4 to 19.6, including the reported zip-distribution case.