depois que incluí a exclusion do tomcat começou esse erro de EL.
reparei q o spring-boot-starter-data-jpa dependências do tomcat, tentei excluir também mas continua o mesmo erro.
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Thu Jul 12 17:47:08 BRT 2018
There was an unexpected error (type=Internal Server Error, status=500).
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is javax.validation.ValidationException: HV000183: Unable to load 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead