Updated installation extraction/download to use Spacelift 1.0.0.Alpha-3

* Additional guess for installation home/fileName based on URL
Adding Spacelift factory initialization directly into plugin application
Improved logging of installation and test phases
Fixed test execution without data provider
Updated logging to better match Jenkins gradle plugin reporting capabilities
Flatting selected profiles and installations in profile
Updated installation socket timeout to 60s by default
Gradle2 only: Using Groovy 2.3 for traits feature

* Additionally modified tools encapsulation in installations
* Preparing for inheritance model
Updating Spacelift JBoss Manager to 0.4.0
Updated plugin readme to ensure that people are using right Gradle version