FIX: Splitcolumns must return an empty array if string was empty (#1315)

* Add test suite from rpraml

* FIX: Splitcolumns must return an empty array if string was empty

* Just the reference scripts

src/test/java/misc/migration/v1_2/CKeyDetail.java

@@ -0,0 +1,41 @@
+package misc.migration.v1_2;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "migtest_ckey_detail")
+public class CKeyDetail {
+
+  @Id
+  Integer id;
+
+  String something;
+
+
+  public CKeyDetail() {
+
+  }
+
+  public CKeyDetail(String something) {
+    this.something = something;
+  }
+
+  public Integer getId() {
+    return id;
+  }
+
+  public void setId(Integer id) {
+    this.id = id;
+  }
+
+  public String getSomething() {
+    return something;
+  }
+
+  public void setSomething(String something) {
+    this.something = something;
+  }
+
+}