(maint) Reload puppetserver service on tests teardown

For tests that modify auth.conf, make sure we reload the puppetserver
service after copying back the old auth.conf, otherwise subsequent tests
may fail.

For example, running `tests/agent/agent_parses_json_catalog.rb` after
`allow_arbitrary_node_name_for_agent.rb` will fail without this change.

Author: GabrielNagy

acceptance/tests/allow_arbitrary_node_name_fact_for_agent.rb

@@ -25,6 +25,7 @@
   teardown do
     modify_tk_config(master, options['puppetserver-config'], {'jruby-puppet' => {'use-legacy-auth-conf' => true}})
     on master, 'cp /etc/puppetlabs/puppetserver/conf.d/auth.bak /etc/puppetlabs/puppetserver/conf.d/auth.conf'
+    on master, "service #{master['puppetservice']} reload"
   end
 
   step "Setup tk-auth rules" do

acceptance/tests/allow_arbitrary_node_name_for_agent.rb

@@ -17,6 +17,7 @@
   teardown do
     on master, 'cp /etc/puppetlabs/puppetserver/conf.d/auth.bak /etc/puppetlabs/puppetserver/conf.d/auth.conf'
     modify_tk_config(master, options['puppetserver-config'], {'jruby-puppet' => {'use-legacy-auth-conf' => true}})
+    on master, "service #{master['puppetservice']} reload"
   end
 
   step "Setup tk-auth rules" do