change progress queue to run a count instead of track as an array of IDs
update payload for internal pubsub tester
update the increment and decrement statements in counter
remove empty object as payload
remove pubsub from ajax-handler extension
add pubsub for progress queue to the data service
remove ajax-handler component
add ajax-handler extension calls to the data service
add pubsub call to progress queue upon ajax error in data service
Merge pull request #195 from ozone-development/enhancement/192/refactor-ajax-handler

Enhancement/192/refactor ajax handler