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 'other' 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

@@ -2,15 +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]
-    type ||= m[1]
-
-    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] || m[1] || 'other'
       dataSource: m[4]
       dataTime: m[5]
     }

test/unit/factories/iUtils.spec.coffee

@@ -56,6 +56,11 @@ describe '$iUtils', () ->
         dataTime: $taskTimestamp
       })
 
-    it 'should throw an error if taskId does not match expected pattern', () ->
-      expect(() -> $iUtils.parseTaskId('index_kafka_twitter_1675e770de9a423_hfdhgjko'))
-        .toThrow(new TypeError("Cannot read property '3' of null"))
+    it 'should not throw an error if taskId does not match expected pattern', () ->
+      task = $iUtils.parseTaskId('index_kafka_twitter_1675e770de9a423_hfdhgjko')
+      expect(task).toEqual({
+        id: 'index_kafka_twitter_1675e770de9a423_hfdhgjko'
+        type: 'other'
+        dataSource: undefined
+        dataTime: undefined
+      })