Reduce randomize testing timeouts in CI (#2648)

* Increase travis_wait time to 45m for randomized tests.

* Bump hypothesis version.

* Decrease to 50 random circuits and fail on first first found error.

* Disable hypothesis deadlines.

.travis.yml

@@ -196,7 +196,7 @@ jobs:
       script:
       - python setup.py build_ext --inplace
       - pip install "qiskit-aer"
-      - travis_wait make test_randomized
+      - travis_wait 45 make test_randomized
 
 matrix:
   fast_finish: true

requirements-dev.txt

@@ -1,5 +1,5 @@
 coverage>=4.4.0
-hypothesis>=4.7.3
+hypothesis>=4.24.3
 ipywidgets>=7.3.0
 jupyter
 matplotlib>=2.1

test/randomized/test_transpiler_equivalence.py

@@ -17,7 +17,7 @@
 
 import os
 
-from hypothesis import assume
+from hypothesis import assume, settings
 from hypothesis.stateful import multiple, rule, precondition, invariant
 from hypothesis.stateful import Bundle, RuleBasedStateMachine
 
@@ -52,6 +52,9 @@
                  FakeTokyo(), FakePoughkeepsie()]
 
 
+@settings(report_multiple_bugs=False,
+          max_examples=50,
+          deadline=None)
 class QCircuitMachine(RuleBasedStateMachine):
     """Build a Hypothesis rule based state machine for constructing, transpiling
     and simulating a series of random QuantumCircuits.