chore(build): enforce java 7 and pin spring-boot-maven-plugin to used spring-boot version
chore(build): enforce java 7 and pin spring-boot-maven-plugin to used
spring-boot version

ronalders/camunda-bpm-spring-boot-starter,camunda/camunda-spring-boot-starter,camunda/camunda-bpm-spring-boot-starter,camunda/camunda-spring-boot-starter,ronalders/camunda-bpm-spring-boot-starter