handle unknown index types gracefully in iUtils

this updates parseTaskId in iUtils.coffee which uses a somwhat strict
regular expression to parse a given task id and extract type,
datasource, and time.

this simply removes throwing the error and falls back to 'Unknown' for
type leaving dataSource and dataTime alone. in case of a match failure,
they would just default to undefined which isn't a blocker to render
/indexing-service view.

src/client/factories/iUtils.coffee

@@ -2,13 +2,10 @@ moment = require '../../../bower_components/moment/min/moment.min.js'
 
 module.exports = ->
   parseTaskId: (taskId) ->
-    m = taskId.match /^((hadoop_convert_segment)|index_(hadoop|realtime|spark)|(archive))_(.+)_(\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z)/
-    type = m[3]
-    type ||= m[2]
-    throw Error("Can't parse #{taskId}") unless m
+    m = taskId.match /^((hadoop_convert_segment)|index_(hadoop|realtime|spark)|(archive))_(.+)_(\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z)/ || []
     {
       id: taskId
-      type
+      type: m[3] || m[2] || 'Unknown'
       dataSource: m[4]
       dataTime: m[5]
     }