Hopefully cleanup last remnants of cassandra (#45)

Author: jonenst

src/test/resources/logback-test.xml

@@ -8,31 +8,6 @@
     <root level="info">
         <appender-ref ref="STDOUT"/>
     </root>
-    <!--
-        suppress the following logs at the end of the tests:
-16:07:28.503 [cluster-nio-worker-0] WARN  io.netty.channel.AbstractChannelHandlerContext - An exception 'java.util.concurrent.RejectedExecutionException: Task com.google.common.util.concurrent.TrustedListenableFutureTask@6a91bfa4 (delegate = java.util.concurrent.Executors$RunnableAdapter@466afa5c[Wrapped task = com.datastax.driver.core.Cluster$Manager$5@6436dc03]) rejected from java.util.concurrent.ThreadPoolExecutor@78cabf[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]' [enable DEBUG level for full stacktrace] was thrown by a user handler's exceptionCaught() method while handling the following exception:
-java.io.IOException: Connexion ré-initialisée par le correspondant
-	at java.base/sun.nio.ch.FileDispatcherImpl.read0(Native Method)
-	at java.base/sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
-	at java.base/sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:276)
-	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:233)
-	at java.base/sun.nio.ch.IOUtil.read(IOUtil.java:223)
-	at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:358)
-	at io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:247)
-	at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1147)
-	at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
-	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
-	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:700)
-	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:635)
-	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:552)
-	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:514)
-	at io.netty.util.concurrent.SingleThreadEventExecutor$6.run(SingleThreadEventExecutor.java:1050)
-	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
-	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
-	at java.base/java.lang.Thread.run(Thread.java:834)
-    -->
-    <logger name="io.netty.channel.AbstractChannelHandlerContext" level="error"/>
-
 
     <!--
         suppress unreadable huge logs..