Minor. [build-issue] Make sure to install setuptools less then version 36.0.0 to avoid module six not found issue

[jerryshao]

The issue is tracked here pypa/setuptools#1042.

[jerryshao]

CC @zjffdu , please review. This blocks our travis building.

[codecov-io]

Codecov Report

Merging #341 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master    #341      +/-   ##
===========================================
+ Coverage     70.46%   70.5%   +0.03%     
- Complexity      726     727       +1     
===========================================
  Files            96      96              
  Lines          5123    5123              
  Branches        774     774              
===========================================
+ Hits           3610    3612       +2     
+ Misses          996     995       -1     
+ Partials        517     516       -1

Impacted Files	Coverage Δ	Complexity Δ
...va/com/cloudera/livy/rsc/rpc/KryoMessageCodec.java	98.11% <0%> (+3.77%)	19% <0%> (+1%)	⬆️

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[zjffdu]

LGTM