* Added authentication plugin for C++ client

* Enabled performance tools for C++ client to use authentication pugin

Replaced some usages of AtomicInteger, AtomicLong and AtomicReference
for their Atomic*FieldUpdater counterpart on classes which get
instantiated a lot, this should reduce memory usage for the broker
and clients which use lots of topics and consumers.

* Add binary-protocol lookup url in documentation

* add webServiceUrl and brokerServiceUrl to clientTools

* Fallback to old version serviceUrl property for clientTools

* Generalize PulsarConfigurationLoader

* fix: PulsarConfigurationLoader Test

Update AdminTools.md

modify a typo