Update Spring Social Facebook to 1.1.1.RELEASE

With the release of Spring Social Facebook 1.1.1 the three Spring Social
projects in the platform (Social, Social Facebook, and Social Twitter)
no longer have a common version. As a result three separate properties
are now used for the projects' versions.
Add a test that verifies the Platform pom's dependency management

The test creates a pom that has a dependency on every artifact for which
the platform provide's dependency management and builds it. The build
will fail if any of the dependencies cannot be resolved.