WebUI: uncomment webdriver installation
Fix reactor package changes
XD-2432, XD-2433, XD-2465, XD-2466, XD-2467: wip
Fixes and polishing

 - Reduce the number of jars for spark application
 - Fix message bus dependnency
 - Plugins to use a different approach to check for spark module
 - Fix jetty server dependencies
Container criteria: PoC
Introduce Spark ModuleType