Changed database and "fixed" flyway-test bug with re-migration of V1.

1. Changed test database from HSQL to H2 based. 
H2 sintax is equals to MYSQL and the problem of two diferent datasources in test (one from jetty:run and another for test) was also solved with URL properties as described in pom property.

2. Fixed flyway-test bug with V1 migration
added tests to verify the http api interface of sendtasks