Switch default JVM target to 1.8

#KT-29405 Fixed

compiler/testData/diagnostics/tests/j+k/defaultMethods.fir.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: JavaInterface.java
 
 public interface JavaInterface {

compiler/testData/diagnostics/tests/j+k/defaultMethods.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: JavaInterface.java
 
 public interface JavaInterface {

compiler/testData/diagnostics/tests/j+k/defaultMethodsIndirectInheritance.fir.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: JavaInterfaceBase.java
 
 public interface JavaInterfaceBase {

compiler/testData/diagnostics/tests/j+k/defaultMethodsIndirectInheritance.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: JavaInterfaceBase.java
 
 public interface JavaInterfaceBase {

compiler/testData/diagnostics/tests/j+k/defaultMethods_warning.fir.kt

@@ -1,4 +1,5 @@
-//!LANGUAGE: -DefaultMethodsCallFromJava6TargetError
+// !LANGUAGE: -DefaultMethodsCallFromJava6TargetError
+// !JVM_TARGET: 1.6
 // FILE: JavaInterface.java
 
 public interface JavaInterface {

compiler/testData/diagnostics/tests/j+k/defaultMethods_warning.kt

@@ -1,4 +1,5 @@
-//!LANGUAGE: -DefaultMethodsCallFromJava6TargetError
+// !LANGUAGE: -DefaultMethodsCallFromJava6TargetError
+// !JVM_TARGET: 1.6
 // FILE: JavaInterface.java
 
 public interface JavaInterface {

compiler/testData/diagnostics/tests/j+k/inheritanceStaticMethodFromInterface.fir.kt

@@ -1,32 +0,0 @@
-// FILE: I.java
-
-public interface I {
-    int a = 1;
-    static void foo() {}
-}
-
-// FILE: C.java
-
-public class C implements I {
-    static int b = 1;
-    static void bar() {}
-}
-
-// FILE: test.kt
-
-class K : C()
-
-fun main() {
-    I.a
-    I.foo()
-
-    C.a
-    C.b
-    C.<!UNRESOLVED_REFERENCE!>foo<!>()
-    C.bar()
-
-    K.<!UNRESOLVED_REFERENCE!>a<!>
-    K.<!UNRESOLVED_REFERENCE!>b<!>
-    K.<!UNRESOLVED_REFERENCE!>foo<!>()
-    K.<!UNRESOLVED_REFERENCE!>bar<!>()
-}

compiler/testData/diagnostics/tests/j+k/inheritanceStaticMethodFromInterface.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // FILE: I.java
 
 public interface I {
@@ -18,7 +19,7 @@ class K : C()
 
 fun main() {
     I.a
-    I.<!INTERFACE_STATIC_METHOD_CALL_FROM_JAVA6_TARGET_ERROR!>foo<!>()
+    I.foo()
 
     C.a
     C.b

compiler/testData/diagnostics/tests/j+k/traitDefaultCall.fir.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: Test.java
 public interface Test {
     default String test() {

compiler/testData/diagnostics/tests/j+k/traitDefaultCall.kt

@@ -1,3 +1,4 @@
+// !JVM_TARGET: 1.6
 // FILE: Test.java
 public interface Test {
     default String test() {