use Xtext 2.7.0 nightly

Change-Id: Ied0bf0bf0cf819cb487b2f514a6deec2f41cbb24
xtext-nightly target platform active by default

Change-Id: Icd157eb0edb3bae70749f7334260af626988a3ba
removed useless SWTBot failing test

Change-Id: Ic886a2a402ef799d522305c6a73e1f09948c2591
29: Fix failing tests due to CompilationTestHelper changes 

Change-Id: Iaeeb6bc1a6062c1baa71503c4d4da85d60d1c5f0
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/29
exclude Guice modules from sonar analisys

To avoid Sonar issue: "Generic wildcard types should not be used in
return parameters"

Change-Id: I64660c1cb8b2f676d5ab558d4261244e14a8cd74
29: clean up tests

Closes #29

Change-Id: I84132ed05a325e06f7f7b5414935152f0383deba
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/29
31: Fix Exceptions during some tests 

Closes #31

Change-Id: I39bff8477ab6269fad340d7dcc1877ea5c7cd65a
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/31
32: api baseline set to xsemantics 1.5.2 

Change-Id: I14bcb99699967092178635ca2a3fe5aa1e8417ab
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32
32: Incremented version 1.6.0

Change-Id: Ia0df860e2c6e1b0520dba5f49d6f1ea4cbcdaea9
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32
32: updated api filter

Change-Id: I5a3b55a44e60e0f14167194329b5dc3c7c49e6fb
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32
32: Test new addToTrace method and remove the deprecated one 

Closes #32

Change-Id: I662ce8c2440ea74c293f855e8db165277101ef58
Task-Url: https://github.com/LorenzoBettini/xsemantics/issues/issue/32