updates travis settings

Author: Christian Kienle

.travis.yml

@@ -1,6 +1,3 @@
 osx_image: xcode8.2
 language: objective-c
-before_install:
-    - brew update
-    - if brew outdated | grep -qx xctool; then brew upgrade xctool; fi
-script: xcodebuild  -verbose -scheme xctool -workspace CDE-Workspace.xcworkspace build test
+script: xcodebuild  -verbose -scheme "Core Data Editor" -workspace CDE-Workspace.xcworkspace build