Switch subunit2sql to use decomposed uri

This commit switches the subunit2sql_uri which get's passed into the
config file template to use decomposed values. The advantage of this
is that it enables using subsets of the information elsewhere.

Change-Id: I30b5117c12897fa3a1cb1e2579b4eec59ba57b2b

manifests/server.pp

@@ -16,7 +16,12 @@
 # == Class: subunit2sql
 #
 class subunit2sql::server (
-  $subunit2sql_db_uri,
+  $db_dialect = 'mysql',
+  $db_user = 'subunit2sql',
+  $db_pass,
+  $db_host,
+  $db_port = '3306',
+  $db_name = 'subunit2sql',
 ) {
 
   file { '/etc/subunit2sql.conf':

manifests/worker.pp

@@ -17,7 +17,12 @@
 #
 define subunit2sql::worker (
   $config_file,
-  $subunit2sql_db_uri,
+  $db_dialect = 'mysql',
+  $db_user = 'subunit2sql',
+  $db_pass,
+  $db_host,
+  $db_port = '3306',
+  $db_name = 'subunit2sql'
 ) {
   $suffix = "-${name}"
 

templates/subunit2sql.conf.erb

@@ -1,4 +1,4 @@
 [DEFAULT]
 
 [database]
-connection = <%= subunit2sql_db_uri %>
+connection = <%= @db_dialect %>://<%= @db_user %>:<%= @db_pass %>@<%= @db_host %>:<%= @db_port %>/<%= @db_name %>