Change MISSING_CONSTRUCTOR_KEYWORD severity to error

And adjust testData

idea/testData/quickfix/migration/missingConstructorKeyword/manyFilesMuitliple.after.kt

@@ -1,4 +1,7 @@
 // "Add missing 'constructor' keyword in whole project" "true"
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
 
 annotation class Ann(val x: Int = 1)
 

idea/testData/quickfix/migration/missingConstructorKeyword/manyFilesMuitliple.before.Main.kt

@@ -1,4 +1,7 @@
 // "Add missing 'constructor' keyword in whole project" "true"
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
+// ERROR: Use 'constructor' keyword after modifiers of primary constructor
 
 annotation class Ann(val x: Int = 1)
 

idea/testData/quickfix/modifiers/removeProtectedModifier.kt

@@ -1,5 +1,5 @@
 // "Remove 'protected' modifier" "true"
 
-class A private <caret>protected () {
+class A private <caret>protected constructor() {
 
 }

idea/testData/quickfix/modifiers/removeProtectedModifier.kt.after

@@ -1,5 +1,5 @@
 // "Remove 'protected' modifier" "true"
 
-class A private () {
+class A private constructor() {
 
 }

idea/testData/quickfix/supertypeInitialization/incompleteConstructor.kt

@@ -1,4 +1,4 @@
 // "Add constructor parameters from Base(Int, Int)" "true"
 open class Base(p1: Int, val p2: Int)
 
-class C private : Base<caret>
+class C private constructor : Base<caret>

idea/testData/quickfix/supertypeInitialization/incompleteConstructor.kt.after

@@ -1,4 +1,4 @@
 // "Add constructor parameters from Base(Int, Int)" "true"
 open class Base(p1: Int, val p2: Int)
 
-class C private (p1: Int, p2: Int) : Base<caret>(p1, p2)
+class C private constructor(p1: Int, p2: Int) : Base<caret>(p1, p2)

idea/testData/quickfix/supertypeInitialization/noAccessibleConstructors.kt

@@ -1,5 +1,5 @@
 // "class org.jetbrains.kotlin.idea.quickfix.SuperClassNotInitialized$AddParenthesisFix" "false"
 // ERROR: This type has a constructor, and thus must be initialized here
-open class Base private(p: Int)
+open class Base private constructor(p: Int)
 
 class C : Base<caret>

idea/testData/quickfix/supertypeInitialization/primaryConstructorInaccessible.kt

@@ -1,5 +1,5 @@
 // "Add constructor parameters from Base(String)" "true"
-open class Base private(p1: Int, val p2: Int) {
+open class Base private constructor(p1: Int, val p2: Int) {
     private constructor() : this(0, 1)
     protected constructor(s: String) : this(s.length(), 1)
 }

idea/testData/quickfix/supertypeInitialization/primaryConstructorInaccessible.kt.after

@@ -1,5 +1,5 @@
 // "Add constructor parameters from Base(String)" "true"
-open class Base private(p1: Int, val p2: Int) {
+open class Base private constructor(p1: Int, val p2: Int) {
     private constructor() : this(0, 1)
     protected constructor(s: String) : this(s.length(), 1)
 }