Move CI jobs in-tree, add Python 3.6 and 3.7

Fixes a pep8 error that managed to sneak in.

Change-Id: I90b91a69537934fd279bda808aae2d2c653b17e1

.zuul.yaml

@@ -0,0 +1,5 @@
+- project:
+    templates:
+      - openstack-python-jobs
+      - openstack-python36-jobs
+      - openstack-python37-jobs

setup.cfg

@@ -17,7 +17,10 @@ classifier =
         Operating System :: OS Independent
         Programming Language :: Python
         Programming Language :: Python :: 2.7
+        Programming Language :: Python :: 3
         Programming Language :: Python :: 3.5
+        Programming Language :: Python :: 3.6
+        Programming Language :: Python :: 3.7
         Programming Language :: Python :: Implementation :: CPython
         Programming Language :: Python :: Implementation :: PyPy
         License :: OSI Approved :: MIT License

wsme/api.py

@@ -179,7 +179,7 @@ class signature(object):
         fd.return_type = self.return_type
         fd.set_options(**self.options)
         if self.arg_types:
-                fd.set_arg_types(argspec, self.arg_types)
+            fd.set_arg_types(argspec, self.arg_types)
         return func