updated swtbot tests

Change-Id: I5e003942788d239727116b4367e46d0cb070605e
updated build files for Xtext 2.5.0 from latest

Change-Id: Iaad7b05f5b24d704a881901d296cd7dd47ce6025
temporarily removed xdoc from TP

to avoid conflicts between xtext 2.4 and 2.5

Change-Id: I0b83b705a647eb6583b7c86c94527a56b6b4a91e