Before this commit, the `JobRepositoryTestUtils` was
tied to the JDBC implementation of the `JobRepository`
as it was requiring a datasource. This makes it unusable
with implementations that do not rely on a datasource
to store batch meta-data (A MongoDB job repository for
instance where no datasource is used).
This commit decouples the `JobRepositoryTestUtils` from
the implementation details of the `JobRepository` by making
it working against the `JobRepository` interface.
This commit also introduces the necessary methods in the
`JobRepository` interface as well as various DAOs to
implement the utilities without having to deal with the
details of the underlying repository implementation.
Resolves#4070
c425137eec