Update reactor package changes
WebUI: Remove npm registry changes
XD-2487 Reactor based MessageHandler for processors

XD-2487 : Create a Reactor based MessageHandler for processors

Updated with PR Review comments

* fix typos in various places
* change compile time dependency from dirt to spring-integration-core
* add timeout to receive calls in test
* remove unused service-activator in XML test config
XD-2487 Polishing

   Fix the tests to use distinct channels/messages
   Add service activator for pojo processor
   Fix compiler warnings
WebUI: uncomment webdriver installation
Fix reactor package changes
XD-2521: Configure Compression Level

Allow the compression level to be set in application/servers.yml.