Change timeout for tempest and heat tests

Change-Id: Ibf31549373a275081d5f5c9829a5697e2c70e774
diff --git a/tcp_tests/managers/runtestmanager.py b/tcp_tests/managers/runtestmanager.py
index f5af0d7..d406b6e 100644
--- a/tcp_tests/managers/runtestmanager.py
+++ b/tcp_tests/managers/runtestmanager.py
@@ -111,6 +111,9 @@
                                 '${_param:runtest_tempest_public_net}'
                             }
                         },
+                        'heat_plugin': {
+                            'build_timeout': '600'
+                        },
                         'share': {
                             'capability_snapshot_support': True,
                             'run_driver_assisted_migration_tests': False,