Cleanup sg: increase interval and number of attemps

Current number of attempts can't be enough for slow envs.

Related-PROD: PRODX-4003
Change-Id: Iac9c6f73c6d5b8dadd924b39bbcc9065d41f4fd2
diff --git a/tempest/lib/common/dynamic_creds.py b/tempest/lib/common/dynamic_creds.py
index c1df32c..259a13a 100644
--- a/tempest/lib/common/dynamic_creds.py
+++ b/tempest/lib/common/dynamic_creds.py
@@ -404,7 +404,7 @@
         secgroups_to_delete = resp_body['security_groups']
         for secgroup in secgroups_to_delete:
             # Workaround for PRODX-4003
-            attempts = 5
+            attempts = 10
             for i in range(attempts):
                 try:
                     nsg_client.delete_security_group(secgroup['id'])
@@ -419,7 +419,7 @@
                     if i == attempts - 1:
                         raise
                     else:
-                        time.sleep(1)
+                        time.sleep(5)
                         continue
 
     def _clear_isolated_net_resources(self):