Return complete response from servers_client

Currently compute servers_client returns Response by
removing top key from Response.
For example-
 return service_client.ResponseBody(resp, body['server'])

As service clients are in direction to move to Tempest-lib, all
service clients should return Response without any truncation.
One good example is Resource pagination links which are lost with current
way of return value. Resource pagination links are present in parallel
(not inside) to top key of Response.

This patch makes compute servers_client to return
complete Response body.

Change-Id: I6a7b5c6144cafcb8f0780db01bf67999a4229389
Implements: blueprint method-return-value-and-move-service-clients-to-lib
diff --git a/tempest/common/compute.py b/tempest/common/compute.py
index 5c4d8af..a76696e 100644
--- a/tempest/common/compute.py
+++ b/tempest/common/compute.py
@@ -18,6 +18,7 @@
 from tempest_lib.common.utils import data_utils
 
 from tempest.common import fixed_network
+from tempest.common import service_client
 from tempest.common import waiters
 from tempest import config
 
@@ -88,12 +89,15 @@
                                                 **kwargs)
 
     # handle the case of multiple servers
-    servers = [body]
+    servers = []
     if 'min_count' in kwargs or 'max_count' in kwargs:
         # Get servers created which name match with name param.
         body_servers = clients.servers_client.list_servers()
         servers = \
             [s for s in body_servers['servers'] if s['name'].startswith(name)]
+    else:
+        body = service_client.ResponseBody(body.response, body['server'])
+        servers = [body]
 
     # The name of the method to associate a floating IP to as server is too
     # long for PEP8 compliance so: