Increase TEMPEST_TIMEOUT

Change-Id: I6d2fcb54089f62ed0a215150fceae8a393ab3c6f
diff --git a/tcp_tests/settings.py b/tcp_tests/settings.py
index d45cd13..2acb36e 100644
--- a/tcp_tests/settings.py
+++ b/tcp_tests/settings.py
@@ -66,4 +66,4 @@
     'docker-prod-virtual.docker.mirantis.net/mirantis/cicd/ci-tempest')  # noqa
 TEMPEST_IMAGE_VERSION = os.environ.get('TEMPEST_IMAGE_VERSION', 'latest')
 TEMPEST_PATTERN = os.environ.get('TEMPEST_PATTERN', 'tempest')
-TEMPEST_TIMEOUT = int(os.environ.get('TEMPEST_TIMEOUT', 1800))
+TEMPEST_TIMEOUT = int(os.environ.get('TEMPEST_TIMEOUT', 18000))