Fix bug 940732 stack.sh can't match sql_connection string.

stack.sh can't match sql_connection string in default
ovs_quantum_plugin.ini. A space is missing between sql_connection
and "=" character.

Change-Id: I001e281145c3b6ba23a84e27e3f0e9315c879d96

etc/quantum/plugins/openvswitch/ovs_quantum_plugin.ini

@@ -3,7 +3,7 @@
 # Example: sql_connection = mysql://root:nova@127.0.0.1:3306/ovs_quantum
 # Replace 127.0.0.1 above with the IP address of the database used by the
 # main quantum server. (Leave it as is if the database runs on this host.)
-sql_connection=sqlite://
+sql_connection = sqlite://
 
 [OVS]
 # This enables the new OVSQuantumTunnelAgent which enables tunneling