This commit raises the minimum supported version of Thymeleaf to 3.0.x. It also upgrades Spring Social to a version that is compatible with Thymeleaf 3. Closes gh-7450 Closes gh-6258 See gh-7885
* actuator -> boot-ops * cli -> boot-cli * launcher -> boot-load * autoconfig -> boot-config * bootstrap -> boot-strap * starters -> boot-up [#54095231] [bs-253] Refactor Zero->Boot