Extended the maven-plugin so after migration it records the current DB version in the "flyway.current" property.
This can later be used in maven builds that needs to know this version.

Also extended maven-plugin-largetest to test the "executions" section of the plugin.
Merge pull request #778 from michaelyaakoby/master

Extended the maven-plugin so after migration it records the current DB version in the "flyway.current" property