Changed addSchemasTo to pass an array instead of a comma-separated list.

When passing a list of schemas to Flyway, I found that the following line:

    schemas = [ "lkp", "dbo", "hst", "qvw", "utl"]

resulted in a table named:

    "lkp,dbo,hst,qvw,utl".schema_version

To fix this, I removed the ```join``` method call and added ```as String[]```.