Brave 5.9.1

Brave 5.9.1. adds some minor fixes and additional features:

Features:

• Kafka Streams Tracing flatMap operator (#1041)
• Update Zipkin Reporter to 2.11.1 (#1038)

Fixes:

• Fix path parsing of HttpClient to return the whole path (#1036)
• Catch Throwable instead of RuntimeException or Error on Kafka Streams (#1030)
• Remove duplicate mockito dependency (#1027)

Thanks to @jcchavezs, @anuraaga, @jorgheymans and @worldtiki for your contributions!