CORD-534 Added separate interfaces for Network and ServiceNetwork

Which are useful to implement OpenStack and XOS client implementation.
And removed "get" from get methods.

Change-Id: Icb477e48179a03e88003b1a38dd8f4ea83d92886
diff --git a/src/main/java/org/opencord/cordvtn/rest/NeutronMl2SubnetsWebResource.java b/src/main/java/org/opencord/cordvtn/rest/NeutronMl2SubnetsWebResource.java
index 4a57d28..3d50604 100644
--- a/src/main/java/org/opencord/cordvtn/rest/NeutronMl2SubnetsWebResource.java
+++ b/src/main/java/org/opencord/cordvtn/rest/NeutronMl2SubnetsWebResource.java
@@ -123,7 +123,7 @@
     public Response getSubnets() {
         log.trace(String.format(MESSAGE, "GET"));
 
-        Set<Subnet> subnets = adminService.getSubnets();
+        Set<Subnet> subnets = adminService.subnets();
         ArrayNode arrayNodes = mapper().createArrayNode();
         subnets.stream().forEach(subnet -> {
             arrayNodes.add(writeSubnet(subnet));
@@ -146,7 +146,7 @@
     public Response getSubnet(@PathParam("id") String id) {
         log.trace(String.format(MESSAGE, "GET " + id));
 
-        Subnet subnet = adminService.getSubnet(SubnetId.of(id));
+        Subnet subnet = adminService.subnet(SubnetId.of(id));
         if (subnet == null) {
             return status(NOT_FOUND).build();
         }