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ClassNotFoundException while calling AWS S3 Upload

See original GitHub issue

When I upload to S3 this happens:

Caused by: java.lang.NoClassDefFoundError: datadog/trace/agent/deps/fasterxml/jackson/databind/ObjectMapper
	at datadog.trace.instrumentation.aws.SpanDecorator.<clinit>(SpanDecorator.java:29)
	at datadog.trace.instrumentation.aws.TracingRequestHandler.beforeRequest(TracingRequestHandler.java:74)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.runBeforeRequestHandlers(AmazonHttpClient.java:770)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:724)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
	at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
	at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
	at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4325)
	at com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4272)
	at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1749)
	at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1611)

Caused by: java.lang.ClassNotFoundException: datadog.trace.agent.deps.fasterxml.jackson.databind.ObjectMapper
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_162]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_162]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_162]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_162]