Add connectorCapabilities global object (#24)

Backport of #24

Author: duffn

test/init.js

@@ -22,3 +22,8 @@ global.getDataSource = global.getSchema = function() {
   };
   return db;
 };
+
+global.connectorCapabilities = {
+  ilike: false,
+  nilike: false,
+};