Change keystone token flush to run hourly

In a recent commit [1] the keystone token flush cron job was changed to
run twice a day. However, this change was not enough for big
deployments.

After getting some customer feedback and looking at what other projects
are doing [2] [3] [4]. It seems that running this job hourly is the way
to go.

[1] Ia0b0fb422318712f4b0f4d023cbb3a61d40bb85d
[2] https://www.ibm.com/support/knowledgecenter/en/SSB27U_6.4.0/com.ibm.zvm.v640.hcpo4/exptoken.htm
[3] https://review.openstack.org/#/c/88670/8
[4] https://github.com/openstack/charm-keystone/blob/master/templates/keystone-token-flush

Conflicts:
	manifests/cron/token_flush.pp
	spec/acceptance/keystone_federation_identity_provider_spec.rb
	spec/acceptance/keystone_federation_shibboleth_spec.rb
	spec/acceptance/keystone_wsgi_apache_spec.rb
	spec/classes/keystone_cron_token_flush_spec.rb

(cherry picked from commit f694b5551f)
Change-Id: I6ec7ec8111bd93e5638cfe96189e36f0e0691d65
Related-Bug: #1649616
(cherry picked from commit 90ffc7f600)

manifests/cron/token_flush.pp

@@ -29,7 +29,7 @@
 #    (optional) Defaults to '1'.
 #
 #  [*hour*]
-#    (optional) Defaults to '0'.
+#    (optional) Defaults to *.
 #
 #  [*monthday*]
 #    (optional) Defaults to '*'.
@@ -56,7 +56,7 @@
 class keystone::cron::token_flush (
   $ensure      = present,
   $minute      = 1,
-  $hour        = 0,
+  $hour        = '*',
   $monthday    = '*',
   $month       = '*',
   $weekday     = '*',

releasenotes/notes/hourly-token-flush-175800b7f614f26e.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - The token flush cron job has been modified to run every hour instead of
+    once a day. This is because this was causing issues with larger
+    deployments, as the operation would take too long and sometimes even fail
+    because of the transaction being so large. Note that this only affects
+    people using the UUID token provider.

spec/acceptance/keystone_federation_identity_provider_spec.rb

@@ -88,7 +88,7 @@ describe 'keystone server running with Apache/WSGI as Identity Provider' do
     end
 
     describe cron do
-      it { is_expected.to have_entry('1 0 * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
+      it { is_expected.to have_entry('1 * * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
     end
 
     shared_examples_for 'keystone user/tenant/service/role/endpoint resources using v2 API' do |auth_creds|

spec/acceptance/keystone_federation_shibboleth_spec.rb

@@ -86,7 +86,7 @@ describe 'keystone server running with Apache/WSGI as Service Provider with Shib
     end
 
     describe cron do
-      it { is_expected.to have_entry('1 0 * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
+      it { is_expected.to have_entry('1 * * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
     end
 
     shared_examples_for 'keystone user/tenant/service/role/endpoint resources using v2 API' do |auth_creds|

spec/acceptance/keystone_wsgi_apache_spec.rb

@@ -82,7 +82,7 @@ describe 'keystone server running with Apache/WSGI with resources' do
     end
 
     describe cron do
-      it { is_expected.to have_entry('1 0 * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
+      it { is_expected.to have_entry('1 * * * * keystone-manage token_flush >>/var/log/keystone/keystone-tokenflush.log 2>&1').with_user('keystone') }
     end
 
     shared_examples_for 'keystone user/tenant/service/role/endpoint resources using v2 API' do |auth_creds|

spec/classes/keystone_cron_token_flush_spec.rb

@@ -9,7 +9,7 @@ describe 'keystone::cron::token_flush' do
   let :params do
     { :ensure      => 'present',
       :minute      => 1,
-      :hour        => 0,
+      :hour        => '*',
       :monthday    => '*',
       :month       => '*',
       :weekday     => '*',
@@ -71,7 +71,7 @@ describe 'keystone::cron::token_flush' do
         :environment => 'PATH=/bin:/usr/bin:/usr/sbin SHELL=/bin/sh',
         :user        => 'keystonecustom',
         :minute      => 1,
-        :hour        => 0,
+        :hour        => '*',
         :monthday    => '*',
         :month       => '*',
         :weekday     => '*',