refactor: use explicit mocha imports (#83)

Author: JustinBeckwith

packages/google-cloud-datacatalog/system-test/.eslintrc.yml

@@ -18,6 +18,7 @@
 
 import * as protosTypes from '../protos/protos';
 import * as assert from 'assert';
+import {describe, it} from 'mocha';
 const datacatalogModule = require('../src');
 
 const FAKE_STATUS_CODE = 1;

packages/google-cloud-datacatalog/test/.eslintrc.yml

@@ -18,6 +18,7 @@
 
 import * as protosTypes from '../protos/protos';
 import * as assert from 'assert';
+import {describe, it} from 'mocha';
 const policytagmanagerModule = require('../src');
 
 const FAKE_STATUS_CODE = 1;

packages/google-cloud-datacatalog/test/gapic-data_catalog-v1beta1.ts

@@ -18,6 +18,7 @@
 
 import * as protosTypes from '../protos/protos';
 import * as assert from 'assert';
+import {describe, it} from 'mocha';
 const policytagmanagerserializationModule = require('../src');
 
 const FAKE_STATUS_CODE = 1;