Allow Gerrit to use 4 threads for indexing changes.

Indexing Gerrit changes can be a time consuming operation.  By
default Gerrit allocates 1 thread to index changes.  This
will increase that to 4 threads which will hopefully make the
indexing operation faster.

Change-Id: I1ff7a09054cb7782acf483aa736ead763a8417db
depends-on: I3aa1909d3edc8aa52d026b3f8e0dfafac4e14f6d

modules/openstack_project/manifests/gerrit.pp

@@ -73,6 +73,7 @@ class openstack_project::gerrit (
   $secondary_index = true,
   $report_bug_text = 'Get Help',
   $report_bug_url = 'http://docs.openstack.org/infra/system-config/project.html#contributing',
+  $index_threads = 1,
 ) {
 
   class { 'jeepyb::openstackwatch':
@@ -206,6 +207,7 @@ class openstack_project::gerrit (
     require                             => Class[openstack_project::server],
     report_bug_text                     => $report_bug_text,
     report_bug_url                      => $report_bug_url,
+    index_threads                       => $index_threads,
   }
 
   mysql_backup::backup_remote { 'gerrit':

modules/openstack_project/manifests/review.pp

@@ -112,6 +112,7 @@ class openstack_project::review (
     core_packedgitlimit                 => '400m',
     core_packedgitwindowsize            => '16k',
     sshd_threads                        => '100',
+    index_threads                       => 4,
     httpd_maxwait                       => '5000min',
     war                                 =>
       'http://tarballs.openstack.org/ci/gerrit/gerrit-v2.8.4.19.4548330.war',