Fulfillment Service: Move from Hibernate schema changes to Flyway

Move to using Flyway in each service.

Doc on moving a service away from being managed by Hibernate to Flyway: https://openlmis.atlassian.net/wiki/x/ibGcBg

Acceptance:

• follow the document on moving from hibernate to flyway

• hibernate no-longer is generating the schema the service uses, flyway does that

• the schema is specified once in the Service's application.properties

• the first flyway migration should be the initial schema of the service (see the doc)

• bootstrap data should be in the second migration script (the first is the initial schema)