#390 - Downgraded RxJava2 dependency to 2.1.1.
#390 - Downgraded RxJava2 dependency to 2.1.1.

Just to make sure that we're in line with Spring Framework 5.0 RC3's dependency as RxJava2 has been known to cause compatibility problems even for bugfix releases.
spring-projects/spring-data-build,thomasdarimont/spring-data-build