Optimization to reuse BindingContext in completion

generators/src/org/jetbrains/kotlin/generators/tests/GenerateTests.kt

@@ -1146,6 +1146,10 @@ fun main(args: Array<String>) {
         testClass<AbstractJava8BasicCompletionTest> {
             model("basic/java8")
         }
+
+        testClass<AbstractCompletionIncrementalResolveTest>() {
+            model("incrementalResolve")
+        }
     }
 
     //TODO: move these tests into idea-completion module