Skip E402 on Cython Files, Fix E402 Errors

pep8 1.6.0 introduced E402, which warns about module-level imports
not being at the top of the file.  However, due to a quirk in Cython,
we need to set a constant at the top of the files, so disable this
check for now.

This also fixes an E402 error in `creds.py`.

Author: DirectXMan12

.travis.sh

@@ -6,7 +6,7 @@ F8_SETUP=$?
 flake8 gssapi
 F8_PY=$?
 
-flake8 gssapi --filename='*.pyx,*.pxd' --ignore=E225,E226,E227,E901
+flake8 gssapi --filename='*.pyx,*.pxd' --ignore=E225,E226,E227,E901,E402
 F8_MAIN_CYTHON=$?
 
 python setup.py nosetests

gssapi/creds.py

@@ -2,13 +2,13 @@
 from gssapi.raw import named_tuples as tuples
 from gssapi._utils import import_gssapi_extension, _encode_dict
 
+from gssapi import names
+
 rcred_imp_exp = import_gssapi_extension('cred_imp_exp')
 rcred_s4u = import_gssapi_extension('s4u')
 rcred_cred_store = import_gssapi_extension('cred_store')
 rcred_rfc5588 = import_gssapi_extension('rfc5588')
 
-from gssapi import names
-
 
 class Credentials(rcreds.Creds):
     """GSSAPI Credentials

tox.ini

@@ -8,10 +8,11 @@ envlist = py27,py33,py34
 
 [testenv]
 # NB(sross): disabling E225,E226,E227,E901 make pep8 think Cython is ok
+# NB(sross): disable E402 because of the GSSAPI="blah" lines needed by Cython
 commands =
     flake8 setup.py
     flake8 gssapi
-    flake8 gssapi --filename='*.pyx,*.pxd' --ignore=E225,E226,E227,E901
+    flake8 gssapi --filename='*.pyx,*.pxd' --ignore=E225,E226,E227,E901,E402
     python setup.py nosetests []
 
 deps = -r{toxinidir}/test-requirements.txt