Update Travis Notifications and disable sending email notifications

.travis.yml

   - test ! -e .kitchen.yml || bundle exec kitchen test -t tests/integration
 
 notifications:
-  on:
-    branch: master
   webhooks:
     urls:
       - https://webhooks.gitter.im/e/6123573504759330786b
     on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
+    on_failure: never  # options: [always|never|change] default: always
     on_start: never     # options: [always|never|change] default: always
     on_cancel: never    # options: [always|never|change] default: always
-    on_error: always    # options: [always|never|change] default: always
+    on_error: never    # options: [always|never|change] default: always
+  email: false