increase defaul aws timeout to 20 minutes

Change-Id: Idf0c2bd16d248bd83af7ae54d113b5af3622679f
diff --git a/src/com/mirantis/mk/Aws.groovy b/src/com/mirantis/mk/Aws.groovy
index 56c5ecc..4ae4fa2 100644
--- a/src/com/mirantis/mk/Aws.groovy
+++ b/src/com/mirantis/mk/Aws.groovy
@@ -74,7 +74,7 @@
     }
 }
 
-def waitForStatus(venv_path, env_vars, stack_name, state, state_failed = [], max_timeout = 600, loop_sleep = 30) {
+def waitForStatus(venv_path, env_vars, stack_name, state, state_failed = [], max_timeout = 1200, loop_sleep = 30) {
     def aws = new com.mirantis.mk.Aws()
     def common = new com.mirantis.mk.Common()
     def python = new com.mirantis.mk.Python()