Fix Travis Ubuntu ARM toolchain installation

Author: Pasi Miettinen

setup/ansible/roles/common_ubuntu/tasks/arm.yml

@@ -6,7 +6,7 @@
   command: add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
 
 - name: Updating apt-cache
-  sudo: Yes
+  sudo: True
   apt: update_cache=yes
 
 - name: Install ARM GCC toolchain (Trusty)