added the spring-boot-exceptions to the spring-boot-modules pom.xml.
<module>spring-boot-crud</module>
<module>spring-boot-data</module>
<module>spring-boot-environment</module>
+ <module>spring-boot-exceptions</module>
<module>spring-boot-flowable</module>
<!-- <module>spring-boot-gradle</module> --> <!-- Not a maven project -->
<module>spring-boot-jasypt</module>
