Allow vertica db hint for queries

Change-Id: I8cfb34ed15a9b9eb68f6b5613584e781e93dba07

manifests/api.pp

@@ -55,6 +55,9 @@
 # [*roles_agent*]
 #   names of roles allowed to write metrics
 #
+# [*vertica_db_hint*]
+#   database hint to pass to vertica
+#
 # [*zookeeper_servers*]
 #   list of zookeeper servers and ports
 #
@@ -76,6 +79,7 @@ class monasca::api (
   $role_delegate         = 'monitoring-delegate',
   $roles_default         = ['admin','monasca-user','_member_'],
   $roles_agent           = ['monasca-agent'],
+  $vertica_db_hint       = '',
   $zookeeper_servers     = undef,
 ) {
   include ::monasca

templates/api-config.yml.erb

@@ -50,6 +50,7 @@ vertica:
   minSize: 4
   maxSize: 32
   checkConnectionWhileIdle: <%= @check_conn_while_idle %>
+  dbHint: <%= @vertica_db_hint %>
 
 middleware:
   enabled: true