Add Heka params to set maximum message injection

This add these Heka configuration options in global.toml
If not provided, use the Heka default values which are currently:
* max_process_inject = 1
* max_timer_inject = 10

Change-Id: If1995fa505aec6ff3000af33c548730dd06d1046

deployment_scripts/puppet/modules/heka/manifests/init.pp

@@ -41,6 +41,12 @@
 # [*max_message_size*]
 #   The maxium Heka message size in bytes (default: undef to use default Heka value).
 #
+# [*max_process_inject*]
+#   The maximum number of messages that a sandbox filter’s ProcessMessage function can inject in a single call (default: undef to use default Heka value).
+#
+# [*max_timer_inject*]
+#   The maximum number of messages that a sandbox filter’s TimerEvent function can inject in a single call (default: undef to use default Heka value).
+#
 # [*dashboard_address*]
 #   The listening adddress for the Heka dashboard (default: undef).
 #
@@ -74,6 +80,8 @@ class heka (
   $hostname = $heka::params::hostname,
   $maxprocs = $heka::params::maxprocs,
   $max_message_size = $heka::params::max_message_size,
+  $max_process_inject = $heka::params::max_process_inject,
+  $max_timer_inject = $heka::params::max_timer_inject,
   $dashboard_address = $heka::params::dashboard_address,
   $dashboard_port = $heka::params::dashboard_port,
   $pre_script = undef,

deployment_scripts/puppet/modules/heka/manifests/params.pp

@@ -22,6 +22,8 @@ class heka::params {
   $hostname = undef
   $maxprocs = $::processorcount
   $max_message_size = undef
+  $max_process_inject = undef
+  $max_timer_inject = undef
   $dashboard_address = undef
   $dashboard_port = '4352'
   $internal_statistics = false

deployment_scripts/puppet/modules/heka/templates/global.toml.erb

@@ -7,3 +7,9 @@ hostname="<%= @hostname %>"
 <% if @max_message_size -%>
 max_message_size = <%= @max_message_size %>
 <% end -%>
+<% if @max_process_inject -%>
+max_process_inject = <%= @max_process_inject %>
+<% end -%>
+<% if @max_timer_inject -%>
+max_timer_inject = <%= @max_timer_inject %>
+<% end -%>