Second attempt at fixing email notification script

ci/scripts/determine-email-body.sh

@@ -6,7 +6,7 @@ pushd git-repo > /dev/null
 popd > /dev/null
 PREV_STATUSES=$( curl https://api.github.com/repos/spring-projects/spring-boot/commits/$PREV_SHA/statuses )
 PREV_STATES=$( echo $PREV_STATUSES | jq -r --arg BUILD_JOB_NAME "$BUILD_JOB_NAME" '.[]  | select(.context == $BUILD_JOB_NAME) | .state' )
-WAS_PREV_SUCCESSFUL=$(echo $PREV_STATES | grep 'success')
+WAS_PREV_SUCCESSFUL=$( echo "$PREV_STATES" | grep 'success' || true )
 
 if [[ $STATE == "success" ]];then
 	echo "Build SUCCESSFUL ${BUILD_PIPELINE_NAME} / ${BUILD_JOB_NAME}" > email-details/subject