Randomize tests

dev_requirements.txt

@@ -1,6 +1,7 @@
 mock>=1.0.0
 pytest
 pytest-cov
+pytest-random
 requests>=1.0.0
 sasl>=0.1.3
 sqlalchemy>=0.9.4

setup.cfg

@@ -2,6 +2,6 @@
 tag_build = dev
 
 [pytest]
-addopts = --tb=short --cov pyhive --cov-report html --cov-report term
+addopts = --random --tb=short --cov pyhive --cov-report html --cov-report term
 norecursedirs = env
 python_files = test_*.py