Fix to support member-update

This fix takes care of the case where member
update does not have pool_id in the request.
Instead of erroring out, it now takes the pool_id
from the member object.

Closes-Bug: #1462456
Change-Id: Id5a79279144c62dea7c72eb119b68b7e3770f5fa

neutron_plugin_contrail/plugins/opencontrail/loadbalancer/loadbalancer_member.py

@@ -175,12 +175,18 @@ def update_properties(self, member_db, id, m):
         return False
 
     def update_object(self, member_db, id, m):
-        if 'pool_id' in m and self._get_member_pool_id(member_db) != m['pool_id']:
-            try:
-                pool = self._api.loadbalancer_pool_read(id=m['pool_id'])
-            except NoIdError:
-                raise loadbalancer.PoolNotFound(pool_id=m['pool_id'])
+        old_pool_id = self._get_member_pool_id(member_db)
+        if 'pool_id' in m and m['pool_id'] != old_pool_id:
+            pool_id = m['pool_id']
+        else:
+            pool_id = old_pool_id
 
+        try:
+            pool = self._api.loadbalancer_pool_read(id=pool_id)
+        except NoIdError:
+            raise loadbalancer.PoolNotFound(pool_id=pool_id)
+
+        if pool_id != old_pool_id:
             db_props = member_db.get_loadbalancer_member_properties()
             members = pool.get_loadbalancer_members()
             for member in members or []: