Fix "_" issue.

services/query.service.ts

@@ -1,8 +1,8 @@
 import * as fs from 'fs'
-import { _, isObject, get } from 'lodash'
+import {  isObject, get } from 'lodash'
 import { Observable, Subject, interval, map, of } from 'rxjs'
 import { DataPrepService } from './dataprep.service'
-
+import _ = require("lodash")
 export class queryService {
 
     private dataPrepService : DataPrepService

test/test1.ts

@@ -5,7 +5,8 @@ data to be filtered
 import { Observable } from "rxjs"
 import { queryService } from "../services/query.service"
 import { Conditions, Storage } from "../services/query.service"
-import { _, isObject } from 'lodash'
+import {  isObject } from 'lodash'
+import _ = require("lodash")
 
 let query = new queryService()
 

test/test2.ts

@@ -5,7 +5,8 @@ data to be filtered
 import { Observable } from "rxjs"
 import { queryService } from "../services/query.service"
 import { Conditions, Storage } from "../services/query.service"
-import { _, isObject } from 'lodash'
+import { isObject } from 'lodash'
+import _ = require("lodash")
 
 let query = new queryService()