Don't wait for account gc

Account GC is automatic, it's not required to wait for cleanup in the
tearDown method

Signed-off-by: Prasanna Santhanam <tsp@apache.org>

test/integration/component/test_vpc.py

@@ -224,25 +224,7 @@ class TestVPC(cloudstackTestCase):
                                      admin=True,
                                      domainid=self.domain.id
                                      )
-        self.cleanup = [self.account]
-        return
-
-    def tearDown(self):
-        try:
-            #Clean up, terminate the created network offerings
-            cleanup_resources(self.apiclient, self.cleanup)
-            interval = list_configurations(
-                                    self.apiclient,
-                                    name='network.gc.interval'
-                                    )
-            wait = list_configurations(
-                                    self.apiclient,
-                                    name='network.gc.wait'
-                                   )
-            # Sleep to ensure that all resources are deleted
-            time.sleep(int(interval[0].value) + int(wait[0].value))
-        except Exception as e:
-            raise Exception("Warning: Exception during cleanup : %s" % e)
+        self._cleanup.insert(0, self.account)
         return
 
     def validate_vpc_offering(self, vpc_offering):