Update Java tests for openjdk-9. (Closes: #893183)

tests/comparators/test_java.py

@@ -79,7 +79,7 @@ def test_diff_procyon(differences_procyon):
     diff(differences_procyon, 'procyon_class_expected_diff')
 
 
-@skip_unless_tool_is_at_least('javap', javap_version, '1.8')
+@skip_unless_tool_is_at_least('javap', javap_version, '9.0.4')
 def test_diff_javap(differences_javap):
     diff(differences_javap, 'javap_class_expected_diff')
 

tests/data/javap_class_expected_diff

-@@ -31,13 +31,13 @@
+@@ -34,13 +34,13 @@
          line 1: 0
  
    public static int main(java.lang.String[]);
      descriptor: ([Ljava/lang/String;)I
-     flags: ACC_PUBLIC, ACC_STATIC
+     flags: (0x0009) ACC_PUBLIC, ACC_STATIC
      Code:
        stack=1, locals=1, args_size=1
 -         0: bipush        42