add travis condition to only send notifications for master branch

.travis.yml

@@ -30,6 +30,8 @@ before_script:
 script:
   - test ! -e .kitchen.yml || bundle exec kitchen test -t tests/integration
 
+if [[ TRAVIS_BRANCH = master ]]; then
+
 notifications:
   webhooks:
     urls:
@@ -39,10 +41,5 @@ notifications:
     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
-
-  email: true
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # 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
+    
+; fi