QuickFixMultiModule: change tests structure

idea/testData/multiModuleQuickFix/other/importFunInCommon/common/a.kt

@@ -0,0 +1,6 @@
+
+package foo
+
+fun foo() {
+
+}

idea/testData/multiModuleQuickFix/other/importFunInCommon/common/b.kt

@@ -0,0 +1,6 @@
+// "Import" "true"
+package bar
+
+fun use() {
+    <caret>foo()
+}

idea/testData/multiModuleQuickFix/other/importFunInCommon/common/b.kt.after

@@ -0,0 +1,8 @@
+// "Import" "true"
+package bar
+
+import foo.foo
+
+fun use() {
+    foo()
+}