KT-6628 Allow imports of classes from root package

#KT-6628 Fixed

idea/testData/quickfix/conflictingImports/afterRemoveConflictingImport.kt

@@ -0,0 +1,8 @@
+// "Remove conflicting import for 'java.util.ArrayList'" "true"
+package test
+
+import java.util.HashMap as ArrayList
+
+fun foo(a : ArrayList<String, String>) {
+
+}

idea/testData/quickfix/conflictingImports/beforeRemoveConflictingImport.kt

@@ -0,0 +1,9 @@
+// "Remove conflicting import for 'java.util.ArrayList'" "true"
+package test
+
+import java.util.ArrayList<caret>
+import java.util.HashMap as ArrayList
+
+fun foo(a : ArrayList<String, String>) {
+
+}

idea/testData/quickfix/uselessImports/afterRemoveUselessImport.kt

@@ -1,8 +0,0 @@
-// "Remove useless import for 'test'" "true"
-package test
-
-import org.jetbrains
-
-fun main(args : Array<String>) {
-
-}

idea/testData/quickfix/uselessImports/beforeRemoveUselessImport.kt

@@ -1,9 +0,0 @@
-// "Remove useless import for 'test'" "true"
-package test
-
-import org.jetbrains
-import test<caret>
-
-fun main(args : Array<String>) {
-
-}