ENH use random states everywhere, never call np.random.

sklearn/cluster/tests/test_hierarchical.py

sklearn/cluster/tests/test_k_means.py

sklearn/covariance/tests/test_robust_covariance.py

sklearn/decomposition/tests/test_fastica.py

sklearn/ensemble/tests/test_forest.py

sklearn/ensemble/tests/test_gradient_boosting.py

sklearn/feature_selection/tests/test_feature_select.py

sklearn/hmm.py

sklearn/linear_model/tests/test_logistic.py

sklearn/linear_model/tests/test_ridge.py

sklearn/linear_model/tests/test_sgd.py

sklearn/manifold/tests/test_locally_linear.py

sklearn/metrics/tests/test_metrics.py

sklearn/metrics/tests/test_pairwise.py

sklearn/neighbors/tests/test_ball_tree.py

sklearn/neighbors/tests/test_neighbors.py

sklearn/svm/tests/test_sparse.py

sklearn/tests/test_kernel_approximation.py

sklearn/tests/test_multiclass.py

sklearn/tests/test_preprocessing.py