Fix: Unterminated quoted string when creating read user

puppetdb in default config will create a read-only user, however there
is a bug[1] with the syntax to set the default read grant.

Fix it with help from comments[2].

[1] puppetlabs#330 (comment)
[2] puppetlabs#339 (comment)

Change-Id: Ifeb89602c40c21dab747536fe74dca4457215b26

Author: waipeng

manifests/database/default_read_grant.pp

@@ -19,7 +19,7 @@
                   acl.defaclacl
                 FROM pg_default_acl acl
                 JOIN pg_namespace ns ON acl.defaclnamespace=ns.oid
-                WHERE acl.defaclacl::text ~ '.*\\\\\"${database_read_only_username}\\\\\"=r/${database_username}\\\".*'
+                WHERE array_to_string(acl.defaclacl, ' + ') ~ '.*(\")?${database_read_only_username}(\")?=r/(\")?${database_username}(\")?.*'
                 AND nspname = '${schema}'",
   }
 
@@ -36,7 +36,7 @@
                   acl.defaclacl
                 FROM pg_default_acl acl
                 JOIN pg_namespace ns ON acl.defaclnamespace=ns.oid
-                WHERE acl.defaclacl::text ~ '.*\\\\\"${database_read_only_username}\\\\\"=U/${database_username}\\\".*'
+                WHERE array_to_string(acl.defaclacl, ' + ') ~ '.*(\")?${database_read_only_username}(\")?=U/(\")?${database_username}(\")?.*'
                 AND nspname = '${schema}'",
   }
 
@@ -53,7 +53,7 @@
                   acl.defaclacl
                 FROM pg_default_acl acl
                 JOIN pg_namespace ns ON acl.defaclnamespace=ns.oid
-                WHERE acl.defaclacl::text ~ '.*\\\\\"${database_read_only_username}\\\\\"=X/${database_username}\\\".*'
+                WHERE array_to_string(acl.defaclacl, ' + ') ~ '.*(\")?${database_read_only_username}(\")?=X/(\")?${database_username}(\")?.*'
                 AND nspname = '${schema}'",
   }
 }