use previous dump as base for a new dump

src/test/java/net/hostsharing/hsadminng/hs/migration/LiquibaseCompatibilityIntegrationTest.java

@@ -32,14 +32,24 @@ import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TE
  * <p>The test needs a dump, ideally from the version of the lastest prod-release:</p>
  *
  * <ol>
- * <li>1. clean the database:<br/>
+ * <li>clean the database:<br/>
  * <code>pg-sql-reset</code>
+ * </li>
  *
- * <li>populate the database:</br>
- * <code>./gradlew bootRun --args='--spring.profiles.active=only-office'</code>
+ * <li>restote the database from latest dump</br>
+ *  <pre><code>
+ *      docker exec -i hsadmin-ng-postgres psql -U postgres postgres \
+ *          <src/test/resources/db/prod-only-office-schema-with-test-data.sql
+ *  </code></pre>
+ * </li>
+ *
+ * <li>run the missing migrations:</br>
+ * <code>gw bootRun --args='--spring.profiles.active=only-office'</code>
+ * </li>
  *
  * <li>create the reference-schema SQL-file with some initializations:</li>
- * <pre><code>cat >src/test/resources/db/prod-only-office-schema-with-test-data.sql <<EOF
+ * <pre><code>
+ * cat >src/test/resources/db/prod-only-office-schema-with-test-data.sql <<EOF
  * -- =================================================================================
  * -- Generated reference-SQL-dump (hopefully of latest prod-release).
  * -- See: net.hostsharing.hsadminng.hs.migration.LiquibaseCompatibilityIntegrationTest
@@ -59,12 +69,14 @@ import static org.springframework.test.context.jdbc.Sql.ExecutionPhase.BEFORE_TE
  *
  * EOF
  * </code></pre>
+ * </li>
  *
  * <li>add the dump to that reference-schema SQL-file:</p>
  * <pre><code>docker exec -i hsadmin-ng-postgres /usr/bin/pg_dump \
  * --column-inserts --disable-dollar-quoting -U postgres postgres \
  * >>src/test/resources/db/prod-only-office-schema-with-test-data.sql
  * </code></pre>
+ * </li>
  * </ol>
  *
  * <p>The generated dump has to be committed to git and will be used in future test-runs