Fix Checksum calculate() with special characters

ebean-ddl-generator/src/test/java/io/ebeaninternal/dbmigration/MChecksumTest.java

@@ -10,9 +10,9 @@ public class MChecksumTest {
 
   @Test
   public void calculate() {
-    File file = new File("src/test/resources/dbmigration/index/1.0__hello.sql");
+    File file = new File("src/test/resources/dbmigration/index-special-chars/1.0__hello.sql");
     assertThat(file).exists();
 
-    assertThat(MChecksum.calculate(file)).isEqualTo(907060870);
+    assertThat(MChecksum.calculate(file)).isEqualTo(1859426839);
   }
 }

ebean-ddl-generator/src/test/resources/dbmigration/index-special-chars/1.0__hello.sql

@@ -0,0 +1 @@
+helloäüü