Fix boolean attribute in jmx view
Fix boolean attribute in jmx view

fixes #184

joshiste/spring-boot-admin,librucha/spring-boot-admin,codecentric/spring-boot-admin,voltean/spring-boot-admin,librucha/spring-boot-admin,joshiste/spring-boot-admin,joshiste/spring-boot-admin,librucha/spring-boot-admin,codecentric/spring-boot-admin,codecentric/spring-boot-admin,voltean/spring-boot-admin,joshiste/spring-boot-admin,librucha/spring-boot-admin,voltean/spring-boot-admin