[UIMA-6010] Upgrade dependencies

- Upgrade xmlunit from 1.5 to 1.6 (test only)
- Upgrade Spring from 3.2.16 to 4.3.22 (latest 4.x release)
- Upgrade rat plugin from 0.11 to 0.13
- Upgrade compiler plugin from 3.5.1 to 3.8.0
- Upgrade JavaDoc plugin from 2.10.3 to 3.1.0
- Upgrade Findbugs plugin from 3.0.3 to 3.0.5
- Upgrade japicmp plugin from 0.9.3 to 0.13.1
2 files changed