https://build.spring.io/browse/INT-FATS5IC-430
Looks like there is a race condition when our polling rate around
data base is too fast and we have access to the DB files even during
application context close.
* Stop polling channel adapter in the tests explicitly after test methods
* Increase some tests performance decreasing timeouts to wait
* Upgrade to Reactor-3.1.5, AssertJ-3.9.1, Derby-10.14.1.0 and some
Gradle plugins
* Upgrade to `reactor-netty-0.7.5`
* Remove workaround from the `StompServerIntegrationTests`
* Upgrade to Spring Data Kay SR5
* Upgrade to Spring Security 5.0.3
* Increase timeouts and performance in the `StreamTransformerParserTests`
cb0d43db6b