Changes

[561118] removes support for old platform and VIATRA versions from setup

Change-Id: I958b48729f2d82dbb8386a491347679aef7879c8

[561118] Dependency version updates

  * Target platform updated to 2019-06
    * Minimum versions were not updated in plugin code, but we will not
test with earlier versions
    * RCPTT was bumped to 2.4.4
  * Xtext minimum version is 2.20
    * Updates pom use exec-maven-plugin for mwe as suggested by Xtext
    * Replaces deprecated Xtext generator support for VQGEN language
    * Removes unnecessary Xpand dependencies
  * Guava requirement is updated to 2.27.1 (in synch with Xtext)
    * Maven dependency override removed as Xtext has fixed its used
Guava version to 27.1.0
  * Eclipse Collections is updated to 10.2.0
  * Regenerated Eclipse project configuration for Maven projects

Change-Id: I17f0e05cb4d6d79c04dd1df52eac44768881aefd
Signed-off-by: Zoltan Ujhelyi <zoltan.ujhelyi@incquerylabs.com>

[560961] Updates dependencies for query tooling

  * Ecore Editor dependency was made optional for query.runtime.ui
  * Unnecessary dependencies were removed from query.runtime.ui
  * Ensured patternlanguage.emf.ui works correctly without the
documentation bundled

Change-Id: Id446690a91185bc5819e3751ce05a5df7c330d10
Signed-off-by: Zoltan Ujhelyi <zoltan.ujhelyi@incquerylabs.com>