Fix a bug in ContentTestBase

- Add @Before setup() to create the initial content  instead of lazy
  initialization in getIdOfTestContent()
Add a JDK 1.7 profile

- Add a profile for JDK 1.7 in the parent POM
Update dependencies

- CXF from 2.6.0 to 2.7.1
- Derby from 10.4.2.0 to 10.9.1.0
- HSQLDB from 2.2.8 to 2.2.9
- Jettison from 1.3.1 to 1.3.2
- Junit from 4.10 to 4.11
- log4j from 1.2.16 to 1.2.17
- logback from 1.0.3 to 1.0.9
- slf4j from 1.6.4 to 1.7.2
- Spring from 3.1.1 to 3.1.3