GS-486: Alerts Resource (#14)

* Make alert resource compatible with new appoptics SDK

* Rename alert resource file from librato

* Fix tests

* Fix type references

* Update alert resource tests for new SDK

* Move alert test to use appoptics naming

* Change variable names

* Add condition block when creating any test alerts (it's required)

* Fix services data structure to be valid

* Use proper type for returned ID

* Apply previous fix in other function

* Fix types and flesh out tests

* Update tests to include tag block on alert resource creaetion