Edit backslashes for lines continuation

It is preferred to wrap long lines in parentheses and not a backslash
for line continuation due to OpenStack Style Guidelines
http://docs.openstack.org/developer/hacking/#general, paragraph 2

Change-Id: Ibfc1022f8e4704fe2040e63bb87322404cea35a4
diff --git a/scenario/test_server_software_config.py b/scenario/test_server_software_config.py
index ad76763..f5e86e6 100644
--- a/scenario/test_server_software_config.py
+++ b/scenario/test_server_software_config.py
@@ -37,7 +37,8 @@
   mode    => 0644,
   content => "The file /tmp/$::bar contains $::foo for server \
 $::deploy_server_id during $::deploy_action",
-}'''
+}
+'''
 
 
 class SoftwareConfigIntegrationTest(scenario_base.ScenarioTestsBase):