fix(install.py) delete old pycrypto module

fixed

install/install.py

@@ -238,6 +238,7 @@ class PreSetup(object):
     def _require_pip(self):
         color_print('开始安装依赖pip包', 'green')
         bash('pip uninstall -y pycrypto')
+        bash('rm -rf /usr/lib64/python2.6/site-packages/Crypto/')
         ret_code = bash('pip install -r requirements.txt')
         self.check_bash_return(ret_code, "安装JumpServer 依赖的python库失败！")