Update SolidFire driver to pass newer flake8

Just an easy update of some things that newer versions of
flake8 complains about.

I've updated my env to flake8 2.1.0, and figured might as 
well fix these up rather ignore them.  pep8 is 1.5.6 and pyflakes
is at 0.8.1

Change-Id: I6d22fe95b67acddcece283e6dca6fe980904bfed

cinder/volume/drivers/solidfire.py

@@ -1,5 +1,5 @@
-# Copyright 2013 SolidFire Inc
 # All Rights Reserved.
+# Copyright 2013 SolidFire Inc
 #
 #    Licensed under the Apache License, Version 2.0 (the "License"); you may
 #    not use this file except in compliance with the License. You may obtain
@@ -19,6 +19,7 @@ import random
 import socket
 import string
 import time
+import warnings
 
 from oslo_config import cfg
 from oslo_log import log as logging
@@ -27,8 +28,6 @@ from oslo_utils import timeutils
 from oslo_utils import units
 import requests
 from requests.packages.urllib3 import exceptions
-import warnings
-
 import six
 
 from cinder import context
@@ -191,14 +190,14 @@ class SolidFireDriver(san.SanISCSIDriver):
     def _build_endpoint_info(self, **kwargs):
         endpoint = {}
 
-        endpoint['mvip'] =\
-            kwargs.get('mvip', self.configuration.san_ip)
-        endpoint['login'] =\
-            kwargs.get('login', self.configuration.san_login)
-        endpoint['passwd'] =\
-            kwargs.get('passwd', self.configuration.san_password)
-        endpoint['port'] =\
-            kwargs.get('port', self.configuration.sf_api_port)
+        endpoint['mvip'] = (
+            kwargs.get('mvip', self.configuration.san_ip))
+        endpoint['login'] = (
+            kwargs.get('login', self.configuration.san_login))
+        endpoint['passwd'] = (
+            kwargs.get('passwd', self.configuration.san_password))
+        endpoint['port'] = (
+            kwargs.get('port', self.configuration.sf_api_port))
         endpoint['url'] = 'https://%s:%s' % (endpoint['mvip'],
                                              endpoint['port'])
 
@@ -359,7 +358,7 @@ class SolidFireDriver(san.SanISCSIDriver):
     def _do_clone_volume(self, src_uuid,
                          src_project_id,
                          vref):
-        """Create a clone of an existing volume or snapshot. """
+        """Create a clone of an existing volume or snapshot."""
         attributes = {}
         qos = {}
 
@@ -562,18 +561,18 @@ class SolidFireDriver(san.SanISCSIDriver):
         # the optional properties.virtual_size is set on the image
         # before we get here
         virt_size = int(image_meta['properties'].get('virtual_size'))
-        min_sz_in_bytes =\
-            math.ceil(virt_size / float(units.Gi)) * float(units.Gi)
+        min_sz_in_bytes = (
+            math.ceil(virt_size / float(units.Gi)) * float(units.Gi))
         min_sz_in_gig = math.ceil(min_sz_in_bytes / float(units.Gi))
 
         attributes = {}
         attributes['image_info'] = {}
-        attributes['image_info']['image_updated_at'] =\
-            image_meta['updated_at'].isoformat()
-        attributes['image_info']['image_name'] =\
-            image_meta['name']
-        attributes['image_info']['image_created_at'] =\
-            image_meta['created_at'].isoformat()
+        attributes['image_info']['image_updated_at'] = (
+            image_meta['updated_at'].isoformat())
+        attributes['image_info']['image_name'] = (
+            image_meta['name'])
+        attributes['image_info']['image_created_at'] = (
+            image_meta['created_at'].isoformat())
         attributes['image_info']['image_id'] = image_meta['id']
         params = {'name': 'OpenStackIMG-%s' % image_id,
                   'accountID': self.template_account_id,
@@ -636,8 +635,8 @@ class SolidFireDriver(san.SanISCSIDriver):
             return
 
         # Check updated_at field, delete copy and update if needed
-        if sf_vol['attributes']['image_info']['image_updated_at'] ==\
-                image_meta['updated_at'].isoformat():
+        if sf_vol['attributes']['image_info']['image_updated_at'] == (
+                image_meta['updated_at'].isoformat()):
             return
         else:
             # Bummer, it's been updated, delete it
@@ -978,8 +977,8 @@ class SolidFireDriver(san.SanISCSIDriver):
             LOG.error(_LE('Failed to get updated stats'))
 
         results = results['result']['clusterCapacity']
-        free_capacity =\
-            results['maxProvisionedSpace'] - results['usedSpace']
+        free_capacity = (
+            results['maxProvisionedSpace'] - results['usedSpace'])
 
         data = {}
         backend_name = self.configuration.safe_get('volume_backend_name')
@@ -988,18 +987,18 @@ class SolidFireDriver(san.SanISCSIDriver):
         data["driver_version"] = self.VERSION
         data["storage_protocol"] = 'iSCSI'
 
-        data['total_capacity_gb'] =\
-            float(results['maxProvisionedSpace'] / units.Gi)
+        data['total_capacity_gb'] = (
+            float(results['maxProvisionedSpace'] / units.Gi))
 
         data['free_capacity_gb'] = float(free_capacity / units.Gi)
         data['reserved_percentage'] = self.configuration.reserved_percentage
         data['QoS_support'] = True
-        data['compression_percent'] =\
-            results['compressionPercent']
-        data['deduplicaton_percent'] =\
-            results['deDuplicationPercent']
-        data['thin_provision_percent'] =\
-            results['thinProvisioningPercent']
+        data['compression_percent'] = (
+            results['compressionPercent'])
+        data['deduplicaton_percent'] = (
+            results['deDuplicationPercent'])
+        data['thin_provision_percent'] = (
+            results['thinProvisioningPercent'])
         self.cluster_stats = data
 
     def attach_volume(self, context, volume,