Increase the heat stack wait time out

This fix handles the usecase where Tacker falsely sets the VNF to
ERROR state after waiting for 50 seconds even though the actual
stack is succesfully completed whose creation time is greater than
50 seconds.

The current default wait time out of 50 seconds is bumped up to
300 seconds as a fair timeout, keeping the memory/cpu constrained
vms/systems in consideration.

Closes-Bug: #1521323
Change-Id: Ied1d904cc0dac2df91dee856100baeb988d65676

devstack/lib/tacker

@@ -294,7 +294,7 @@ function configure_tacker {
     iniset $TACKER_CONF servicevm_nova region_name $REGION_NAME
 
     iniset $TACKER_CONF servicevm_heat heat_uri http://$SERVICE_HOST:8004/v1
-    iniset $TACKER_CONF servicevm_heat stack_retries 10
+    iniset $TACKER_CONF servicevm_heat stack_retries 60
     iniset $TACKER_CONF servicevm_heat stack_retry_wait 5
 
     _tacker_setup_rootwrap

etc/tacker/tacker.conf

@@ -413,8 +413,8 @@ auth_plugin = password
 
 [servicevm_heat]
 heat_uri = http://localhost:8004/v1
-stack_retries = 5
-stack_retry_wait = 3
+stack_retries = 60
+stack_retry_wait = 5
 
 [servicevm_agent]
 # VM agent requires that an interface driver be set. Choose the one that best

tacker/vm/drivers/heat/heat.py

@@ -36,12 +36,13 @@ LOG = logging.getLogger(__name__)
 CONF = cfg.CONF
 OPTS = [
     cfg.IntOpt('stack_retries',
-               default=10,
-               help=_("Number of attempts to retry for stack deletion")),
+               default=60,
+               help=_("Number of attempts to retry for stack"
+                      "creation/deletion")),
     cfg.IntOpt('stack_retry_wait',
                default=5,
-               help=_("Wait time between two successive stack delete "
-                      "retries")),
+               help=_("Wait time between two successive stack"
+                      "create/delete retries")),
 ]
 CONF.register_opts(OPTS, group='servicevm_heat')
 STACK_RETRIES = cfg.CONF.servicevm_heat.stack_retries