Change Signature: enable on primary constructor keyword (#2482)

#KT-19744 Fixed

idea/testData/refactoring/changeSignature/PrimaryConstructorOnConstructorKeywordAfter.kt

@@ -0,0 +1,25 @@
+open class A internal constructor(s: String) {
+    constructor(a: Int) : this("foo") {
+
+    }
+}
+
+open class B : A {
+    constructor() : super("foo") {
+
+    }
+}
+
+open class C : A {
+    constructor() : super("foo") {
+
+    }
+}
+
+class D : A("foo") {
+
+}
+
+fun test() {
+    A("foo")
+}

idea/testData/refactoring/changeSignature/PrimaryConstructorOnConstructorKeywordBefore.kt

@@ -0,0 +1,25 @@
+open class A internal <caret>constructor() {
+    constructor(a: Int) : this() {
+
+    }
+}
+
+open class B : A {
+    constructor() : super() {
+
+    }
+}
+
+open class C : A {
+    constructor() {
+
+    }
+}
+
+class D : A() {
+
+}
+
+fun test() {
+    A()
+}