[semver:patch] Add exit code 1 on failed deployment (#113)

Currently, code deploy failures do not fail the job.  This adds a exit code so that the job fails properly and users are notified when a deployment isn't successful

src/orb.yml.hbs

@@ -994,6 +994,7 @@ commands:
                       echo "Deployment succeeded."
                     else
                       echo "Deployment failed."
+                      exit 1
                     fi
                   fi
                   echo "export CCI_ORB_AWS_ECS_DEPLOYED_REVISION='${DEPLOYED_REVISION}'" >> $BASH_ENV