Upgrade to Boot 1.4.1

- Align related spring train deps
- Modify some other deps to get correct versions
- Some testing changes as boot 1.4.1 shuffled some
  test stuff around.
- Fixed deprecations with newer boot and framework
- Fixes #256

spring-statemachine-samples/datajpa/src/main/java/demo/datajpa/Application.java

@@ -17,7 +17,7 @@ package demo.datajpa;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.boot.orm.jpa.EntityScan;
+import org.springframework.boot.autoconfigure.domain.EntityScan;
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
 
 //tag::snippetA[]