Constraint incorporation

In a constraint system a new bound is incorporated:
all new constrains that can be derived from it
(and from existing ones) are added

compiler/testData/diagnostics/tests/inference/upperBounds/conflictingSubstitutionsFromUpperBound.kt

@@ -7,6 +7,6 @@ fun <T, C: Collection<T>> convert(src: Collection<T>, dest: C): C = throw Except
 
 fun test(l: List<Int>) {
     //todo should be inferred
-    val r = <!TYPE_INFERENCE_UPPER_BOUND_VIOLATED!>convert<!>(l, <!TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>HashSet<!>())
-    checkSubtype<Int>(<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>r<!>)
+    val r = convert(l, HashSet())
+    checkSubtype<Collection<Int>>(r)
 }

compiler/testData/diagnostics/tests/inference/upperBounds/doNotInferFromBoundsOnly.kt

@@ -29,8 +29,7 @@ fun test3() {
 fun <T, R: T> emptyStrangeMap1(t: T): Map<T, R> = throw Exception("$t")
 
 fun test4() {
-    //todo we may infer 'Int' for 'R' here
-    <!TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>emptyStrangeMap1<!>(1)
+    emptyStrangeMap1(1)
 }
 
 //--------------
@@ -38,8 +37,7 @@ fun test4() {
 fun <T: A, R: T> emptyStrangeMap2(t: T): Map<T, R> where R: A = throw Exception("$t")
 
 fun test5(a: A) {
-    //todo we may infer 'A' for 'R' here
-    <!TYPE_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>emptyStrangeMap2<!>(a)
+    emptyStrangeMap2(a)
 }
 
 //--------------