import random, time in geetest.py

flake8 testing of https://github.com/Jack-Cherish/python-spider on Python 3.6.3

$ __flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics__
```
./geetest.py:206:5: F821 undefined name 'time'
				time.sleep(0.5)
    ^
./geetest.py:216:3: F821 undefined name 'ActionChains'
		ActionChains(self.browser).click_and_hold(slider).perform()
  ^
./geetest.py:218:8: F821 undefined name 'random'
			x = random.choice(track)
       ^
./geetest.py:219:4: F821 undefined name 'ActionChains'
			ActionChains(self.browser).move_by_offset(xoffset=x, yoffset=0).perform()
   ^
./geetest.py:221:3: F821 undefined name 'time'
		time.sleep(0.5)
  ^
./geetest.py:222:3: F821 undefined name 'ActionChains'
		ActionChains(self.browser).release().perform()
  ^
6     F821 undefined name 'time'
6
```

Author: cclauss

geetest.py

@@ -6,6 +6,8 @@
 from selenium import webdriver
 from bs4 import BeautifulSoup
 import PIL.Image as image
+import time
+import random
 import re
 
 class Crack():