[sqllab] add support for Jinja templating (#1426)

* [sqllab] add support for Jinja templating

* Adressing comments

* Presto macros

* Progress

* Addressing coments

caravel/assets/javascripts/SqlLab/components/SqlEditor.jsx

@@ -69,6 +69,7 @@ class SqlEditor extends React.Component {
       sql: this.props.queryEditor.sql,
       sqlEditorId: this.props.queryEditor.id,
       tab: this.props.queryEditor.title,
+      schema: this.props.queryEditor.schema,
       tempTableName: this.state.ctas,
       runAsync,
       ctas,