Remove pep8 whitespace ignores

We had carried over the full list of pep8 whitespace ignores from nova.
Trying to address them all in the entire nova repository would have been
too big a task; but it's tenable here in placement.

Do it now rather than letting these whitespace issues compound.

This change removes the E* whitespace ignores and fixes the pep8 issues
they were masking.

Change-Id: Icbabdb9b56fd5a3e9fd14ab537abf3d0d6456fee

placement/conf/api.py

@@ -15,14 +15,16 @@
 
 from oslo_config import cfg
 
-api_group = cfg.OptGroup('api',
+api_group = cfg.OptGroup(
+    'api',
     title='API options',
     help="""
 Options under this group are used to define Placement API.
 """)
 
 api_opts = [
-    cfg.StrOpt("auth_strategy",
+    cfg.StrOpt(
+        "auth_strategy",
         default="keystone",
         choices=("keystone", "noauth2"),
         deprecated_group="DEFAULT",