make tests more independent from all/imported classes behavior

java/java-tests/testData/codeInsight/completion/normalSorting/ChangePreselectionOnSecondInvocation.java

@@ -1,6 +1,12 @@
 class Util {
   {
-    FooZoo<caret>
+    Another.fooZoo<caret>
   }
 
+}
+
+class Another {
+  private static void fooZoo() {}
+  static void fooZooGoo() {}
+  static void fooZooImpl() {}
 }

java/java-tests/testData/codeInsight/completion/normalSorting/PreferInterfacesInImplements.java

@@ -1,6 +1,6 @@
-interface FooIntf {}
-class FooClass {}
-class Foo {}
+interface XFooIntf {}
+class XFooClass {}
+class XFoo {}
 
-class Goo implements Fo<caret> {
+class Goo implements XFo<caret> {
 }