Minor fixes to use with Spring Boot Actuator Endpoints v2 RC1

[andrescabrera]

Apparently /beans actuator endpoint returns a different JSON than the spring-boots-actuator-v1 when using v2 RC1 (the bean id is on the object key) so i've made a few changes on the code to support that.

Tested with: compile "org.springframework.boot:spring-boot-starter-actuator:2.0.0.RC1"

It would be better to support both versions through configuration on the node app...