Fix shocco errors and warnings

A few Markdown-oriented issues were causing Docutils errors to
leak into the end-user docs on http://devstack.org

Change-Id: I51fa9698afb1bfb48596478d83bd1fdcd84ac52e
diff --git a/lib/neutron b/lib/neutron
index 44fb9e1..00852df 100644
--- a/lib/neutron
+++ b/lib/neutron
@@ -208,7 +208,7 @@
 source $TOP_DIR/lib/neutron_plugins/services/vpn
 
 # Firewall Service Plugin functions
-# --------------------------------
+# ---------------------------------
 source $TOP_DIR/lib/neutron_plugins/services/firewall
 
 # Use security group or not
@@ -494,6 +494,7 @@
     # For main plugin config file, set ``Q_PLUGIN_CONF_PATH``, ``Q_PLUGIN_CONF_FILENAME``.
     # For addition plugin config files, set ``Q_PLUGIN_EXTRA_CONF_PATH``,
     # ``Q_PLUGIN_EXTRA_CONF_FILES``.  For example:
+    #
     #    ``Q_PLUGIN_EXTRA_CONF_FILES=(file1, file2)``
     neutron_plugin_configure_common