ENT-1627 - Allow to set hibernate.dialect setting for pluggable database (#687)

Optional property `database.hibernateDialect` which maps to `hibernate.dialect`.

node-api/src/main/kotlin/net/corda/nodeapi/internal/persistence/CordaPersistence.kt

@@ -35,7 +35,8 @@ data class DatabaseConfig(
         val runMigration: Boolean = false,
         val transactionIsolationLevel: TransactionIsolationLevel = TransactionIsolationLevel.REPEATABLE_READ,
         val schema: String? = null,
-        val exportHibernateJMXStatistics: Boolean = false
+        val exportHibernateJMXStatistics: Boolean = false,
+        val hibernateDialect: String? = null
 )
 
 // This class forms part of the node config and so any changes to it must be handled with care

node-api/src/main/kotlin/net/corda/nodeapi/internal/persistence/HibernateConfiguration.kt

@@ -90,6 +90,9 @@ class HibernateConfiguration(
             }
             config.setProperty("hibernate.default_schema", schemaName)
         }
+        databaseConfig.hibernateDialect?.apply {
+            config.setProperty("hibernate.dialect", this)
+        }
 
         schemas.forEach { schema ->
             // TODO: require mechanism to set schemaOptions (databaseSchema, tablePrefix) which are not global to session