OpenstackRouting refactoring

- Replace OpenstackPortInfo with HostService
- Replace OpenstackRoutingConfig with OpenstackNodeService
  (Remove OpenstackRoutingConfig)
- Rebased with 10330 (existing_vm)
- Added initialization process using OpenstackNodeListener

Change-Id: If2ce8eb86d242a7180c9154e1a0f1668b266bf1c
diff --git a/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSecurityGroupRulePopulator.java b/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSecurityGroupRulePopulator.java
index 7477404..b963988 100644
--- a/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSecurityGroupRulePopulator.java
+++ b/apps/openstacknetworking/switching/src/main/java/org/onosproject/openstacknetworking/switching/OpenstackSecurityGroupRulePopulator.java
@@ -50,7 +50,7 @@
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import static org.onosproject.openstacknetworking.switching.Constants.*;
+import static org.onosproject.openstacknetworking.Constants.*;
 
 /**
  * Populates flows rules for Security Groups of VMs.