Please update <service> name to comply with Spring Boot 2 rules for externalized configuration

[ka4ok85]

Please see https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.0-Migration-Guide#externalized-configuration:

All prefixes must be in kebab-case format (lower-case, hyphen separated), acme.myProject or acme.my_project are invalid - you must use acme.my-project here

Steps to reproduce:

1. Spring Boot version: 2.0.0.M7
2. Watson-spring-boot-starter version: 0.0.2
3. During startup following error returned:

Configuration property name 'watson.language_translator' is not valid:

Invalid characters: '_' Bean: com.ibm.watson.developer_cloud.spring.boot.WatsonAutoConfiguration Reason: Canonical names should be kebab-case ('-' separated), lowercase alpha-numeric characters and must start with a letter

Modify 'watson.language_translator' so that it conforms to the canonical names requirements.

[germanattanasio]

@mkistler ☝️

[ka4ok85]

Resolved in #8