Opentracing across workers (#5771)

Propagate opentracing contexts across workers


Also includes some Convenience modifications to opentracing for servlets, notably:
- Add boolean to skip the whitelisting check on inject
  extract methods. - useful when injecting into carriers
  locally. Otherwise we'd always have to include our
  own servername and whitelist our servername
- start_active_span_from_request instead of header
- Add boolean to decide whether to extract context
  from a request to a servlet

1 files changed, 1 insertions, 0 deletions

diff --git a/changelog.d/5771.feature b/changelog.d/5771.feature
new file mode 100644
index 0000000000..f2f4de1fdd
--- /dev/null
+++ b/changelog.d/5771.feature
@@ -0,0 +1 @@
+Make Opentracing work in worker mode.