(at least) CPU tests needs to be run on PRs

[bennahugo]

@sjperkins can you help me run through your test suite. Nose does not work for some reason I'm yet to figure out:

tensorflow: Level 1: Registering Greater,flops (<function _greater_flops at 0x7f8955ea8ae8>) in statistical functions.
tensorflow: Level 1: Registering LessEqual,flops (<function _less_equal_flops at 0x7f8955ea8b70>) in statistical functions.
tensorflow: Level 1: Registering Less,flops (<function _less_flops at 0x7f8955ea8bf8>) in statistical functions.
tensorflow: Level 1: Registering Equal,flops (<function _equal_flops at 0x7f8955ea8c80>) in statistical functions.
tensorflow: Level 1: Registering NotEqual,flops (<function _not_equal_flops at 0x7f8955ea8d08>) in statistical functions.
tensorflow: Level 1: Registering SquaredDifference,flops (<function _squared_difference_flops at 0x7f8955ea8d90>) in statistical functions.
tensorflow: Level 1: Registering Mean,flops (<function _mean_flops at 0x7f8955ea8ea0>) in statistical functions.
tensorflow: Level 1: Registering Sum,flops (<function _sum_flops at 0x7f8955ea8f28>) in statistical functions.
tensorflow: Level 1: Registering ArgMax,flops (<function _arg_max_flops at 0x7f8955e32048>) in statistical functions.
tensorflow: Level 1: Registering ArgMin,flops (<function _arg_min_flops at 0x7f8955e320d0>) in statistical functions.
tensorflow: Level 1: Registering BiasAddGrad,flops (<function _bias_add_grad_flops at 0x7f8955e32158>) in statistical functions.
tensorflow: Level 1: Registering AvgPool,flops (<function _avg_pool_flops at 0x7f8955e322f0>) in statistical functions.
tensorflow: Level 1: Registering MaxPool,flops (<function _max_pool_flops at 0x7f8955e32378>) in statistical functions.
tensorflow: Level 1: Registering AvgPoolGrad,flops (<function _avg_pool_grad_flops at 0x7f8955e32400>) in statistical functions.
tensorflow: Level 1: Registering MaxPoolGrad,flops (<function _max_pool_grad_flops at 0x7f8955e32488>) in statistical functions.
tensorflow: Level 1: Registering Conv2DBackpropInput,flops (<function _conv_2d_backprop_input_flops at 0x7f8955e32510>) in statistical functions.
tensorflow: Level 1: Registering Conv2DBackpropFilter,flops (<function _conv_2d_backprop_filter_flops at 0x7f8955e32598>) in statistical functions.
tensorflow: Level 1: Registering AddN,flops (<function _add_n_flops at 0x7f8955e32620>) in statistical functions.
tensorflow: Level 1: Registering Fact (<function _set_call_cpp_shape_fn.<locals>.call_without_requiring at 0x7f890b939f28>) in default shape functions.
--------------------- >> end captured logging << ---------------------

----------------------------------------------------------------------
Ran 1 test in 0.005s

FAILED (errors=1)

this works: python3 test_feed_rotation.py

[bennahugo]

Also needs to make sure the system builds and installes on both py2 and py3

https://github.com/ska-sa/meqtrees-timba/blob/py3ize/.travis.yml

If possible the tests needs modification so that meqtrees can be run in py2 and montblanc tested in py3

[sjperkins]

Rather run the tests with pytest