[#ARCH-157] Create a DBUnit/HSQLDB integration test; interim commit.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; introducing test dependencies.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; a working persistence.xml.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; a working series-update test.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; another series-update test.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; refactored DBUnit setup into its own JUnit rules.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; minor test cleanup.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; final tests.
[#ARCH-157] Create a DBUnit/HSQLDB integration test; new .travis.yml to run (fast) integration tests.
Merge remote-tracking branch 'origin/arch-157'