RUBY-1094 Test to verify that SSC can enable transaction and error tracing
RUBY-1094 Fix feature gating to allow SSC to override local config
Merge branch 'dev' into release
RUBY-1098 Fix issue preventing Thread Profiler from reporting

newrelic_transaction thread local variable was changed to store a list
of transactions, which broke an assumption made by the thread profiler
when it tried to categorize captured stack traces.  Update the profiler
code to be compatible with the new agent internals and to use the
threadsafe api to record supportability metrics

Fix underlying error caused by change in newrelic_transaction var
RUBY-1098 Multiverse test and CHANGELOG for thread profiling fix