Bump mongo-java-driver from 3.12.4 to 3.12.5 in /core (#2844)

Bumps [mongo-java-driver](https://github.com/mongodb/mongo-java-driver) from 3.12.4 to 3.12.5.
- [Release notes](https://github.com/mongodb/mongo-java-driver/releases)
- [Commits](mongodb/mongo-java-driver@r3.12.4...r3.12.5)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

core/build.gradle

@@ -179,7 +179,7 @@ dependencies {
     testCompile 'org.apache.httpcomponents:httpclient:4.5.9'
     testCompile 'redis.clients:jedis:3.3.0'
     testCompile 'com.rabbitmq:amqp-client:5.9.0'
-    testCompile 'org.mongodb:mongo-java-driver:3.12.4'
+    testCompile 'org.mongodb:mongo-java-driver:3.12.5'
 
     testCompile ('org.mockito:mockito-core:3.3.3') {
         exclude(module: 'hamcrest-core')