KT-5035 Smart completion should work after "in" keyword in for loop

#KT-5035 Fixed

idea/testData/completion/smart/forLoopRange/AfterDot.kt

@@ -0,0 +1,9 @@
+fun foo(p: String) {
+    for (i in p.<caret>)
+}
+
+fun String.extFun(): Collection<Int>{}
+
+// EXIST: toString
+// EXIST: substring
+// EXIST: extFun

idea/testData/completion/smart/forLoopRange/ExtensionIteratorMethod.kt

@@ -0,0 +1,14 @@
+trait X
+trait Y
+
+fun X.iterator(): Y
+fun Y.next(): Int
+fun Y.hasNext(): Boolean
+
+
+fun foo(x: X, y: Y) {
+    for (i in <caret>)
+}
+
+// EXIST: x
+// ABSENT: y

idea/testData/completion/smart/forLoopRange/NoGenericT.kt

@@ -0,0 +1,9 @@
+fun<T> xxx1(): T {}
+fun<T : Collection<String>> xxx2(): T {}
+
+fun foo() {
+    for (i in <caret>)
+}
+
+// ABSENT: xxx1
+// EXIST: xxx2

idea/testData/completion/smart/forLoopRange/Nullable.kt

@@ -0,0 +1,12 @@
+fun foo(p: String?) {
+    for (i in <caret>)
+}
+
+fun f(): Collection<Int>? {}
+
+// ABSENT: { lookupString:"p", itemText: "p" }
+// EXIST: { lookupString:"p", itemText: "!! p", typeText:"String?" }
+// EXIST: { lookupString:"p", itemText: "?: p", typeText:"String?" }
+// ABSENT: { lookupString:"f", itemText: "f" }
+// EXIST: { lookupString:"f", itemText: "!! f", typeText:"Collection<Int>?" }
+// EXIST: { lookupString:"f", itemText: "?: f", typeText:"Collection<Int>?" }

idea/testData/completion/smart/forLoopRange/Simple.kt

@@ -0,0 +1,16 @@
+fun foo(p1: String, p2: Int, p3: Collection<Int>) {
+    for (i in <caret>)
+}
+
+fun f1(): String{}
+fun f2(): Int{}
+fun f3(): Iterable<Char>{}
+
+// EXIST: p1
+// ABSENT: p2
+// EXIST: p3
+// EXIST: f1
+// ABSENT: f2
+// EXIST: f3
+// EXIST: { lookupString:"listOf", itemText: "listOf", tailText: "(vararg values: T) (kotlin)", typeText:"List<T>" }
+

idea/testData/completion/smart/forLoopRange/SmartCasts.kt

@@ -0,0 +1,8 @@
+fun foo(p1: Any, p2: Any) {
+    if (p1 is String) {
+        for (i in <caret>)
+    }
+}
+
+// EXIST: p1
+// ABSENT: p2