[core] Hue CPU reaches ~100% usage while uploading files with SSL to HTTPFS/WebHDFS

RC of issue in urllib3:
https://github.com/shazow/urllib3/issues/626
https://github.com/shazow/urllib3/commit/4aebc69dbf1f2eecbff61c3902a9074be4722837
And here the urllib fix was merged with the "requests" package that we use (with some versions later):
https://github.com/kennethreitz/requests/commit/d7026bfb2a015c2187009e7e159bc6abc251c355#diff-64d7bf0a2c883b611c1456066939899b