Added system alert templates documentation and examples. (#2)
Added system alert templates documentation and examples. (#2)

* SPOI-11226 Document REST API changes for 3.8 release

Updated description of the following REST APIs:

POST /ws/v2/licenses
GET /ws/v2/licenses/current

Added description of the following REST APIs:

PUT /ws/v2/systemAlerts/templates/system/"{name}"
DELETE /ws/v2/systemAlerts/templates/system/'{name}"
GET /ws/v2/systemAlerts/templates/system
GET /ws/v2/systemAlerts/templates/system/"{name}"
PUT /ws/v2/systemAlerts/"validate/script"

* Added system alert templates documentation and examples.

deepak-narkhede/docs,DataTorrent/docs