control flow: take qualifier of left part of assignment expression into account (IDEA-146221)

java/java-tests/testData/inspection/fieldCanBeLocal/fieldUsedInAnotherMethodAsQualifier/expected.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<problems/>

java/java-tests/testData/inspection/fieldCanBeLocal/fieldUsedInAnotherMethodAsQualifier/src/Test.java

@@ -0,0 +1,15 @@
+class D {
+    D first;
+}
+
+class Test {
+    private D myDSettings;
+
+    protected void setUp() {
+        myDSettings = null;
+    }
+
+    public void testModuleCycle() {
+        myDSettings.first = null;
+    }
+}