Make heat yaql limits configurable

We need to be able to tune the yaql settings for heat on the udnercloud.
This change exposes heat's yaql limit_iterators and memory_quota
settings via HeatYaqlLimitIterators and HeatYaqlMemoryQuota. This change
also increases the default limit from 1000 to 10000 on the undercloud
installations.

Change-Id: I37669bbf642146e46388950c97ac5123c5b1180e
Closes-Bug: #1817794

deployment/heat/heat-base-puppet.yaml

@@ -99,6 +99,18 @@ parameters:
     description: >
         Cron to purge db entries marked as deleted and older than $age - Log destination
     default: '/dev/null'
+  HeatYaqlLimitIterators:
+    type: number
+    description: >
+        The maximum number of elements in collection yaql expressions can take
+        for its evaluation.
+    default: 1000
+  HeatYaqlMemoryQuota:
+    type: number
+    description: >
+        The maximum size of memory in bytes that yaql exrpessions can take for
+        its evaluation.
+    default: 100000
   HeatMaxJsonBodySize:
     default: 4194304
     description: Maximum raw byte size of the Heat API JSON request body.
@@ -174,8 +186,8 @@ outputs:
             heat::keystone::domain::domain_admin_email: 'heat_stack_domain_admin@localhost'
             heat::db::database_db_max_retries: -1
             heat::db::database_max_retries: -1
-            heat::yaql_memory_quota: 100000
-            heat::yaql_limit_iterators: 1000
+            heat::yaql_memory_quota: {get_param: HeatYaqlMemoryQuota}
+            heat::yaql_limit_iterators: {get_param: HeatYaqlLimitIterators}
             heat::cors::max_age: 3600
             heat::cors::allow_headers: 'Content-Type,Cache-Control,Content-Language,Expires,Last-Modified,Pragma,X-Auth-Token'
             heat::cors::expose_headers: 'Content-Type,Cache-Control,Content-Language,Expires,Last-Modified,Pragma'

environments/undercloud.yaml

@@ -82,6 +82,7 @@ parameter_defaults:
   HeatMaxResourcesPerStack: -1
   HeatMaxJsonBodySize: 4194304
   HeatReauthenticationAuthMethod: 'trusts'
+  HeatYaqlLimitIterators: 10000
   # Disable non-lifecycle stack actions like
   # snapshot, resume, cancel update and stack check.
   HeatApiPolicies: