Add missing packages in setup.py.in (#451)

* add missing packages in setup.py.in

* Use `setuptools.find_packages`

setup.py.in

@@ -22,7 +22,7 @@ from distutils.command.build import build
 from multiprocessing import cpu_count
 from subprocess import call
 
-from setuptools import setup
+from setuptools import setup, find_packages
 from setuptools.dist import Distribution
 
 
@@ -38,23 +38,6 @@ requirements = [
 ]
 
 
-packages = ["qiskit",
-            "qiskit.backends",
-            "qiskit.dagcircuit",
-            "qiskit.extensions",
-            "qiskit.extensions.standard",
-            "qiskit.extensions.simulator",
-            "qiskit.extensions.quantum_initializer",
-            "qiskit.mapper",
-            "qiskit.qasm",
-            "qiskit.qasm._node",
-            "qiskit.unroll",
-            "qiskit.tools",
-            "qiskit.tools.apps",
-            "qiskit.tools.qcvv",
-            "qiskit.tools.qi"]
-
-
 # C++ components compilation
 class QasmSimulatorCppBuild(build):
     def run(self):
@@ -135,7 +118,7 @@ setup(
         "Topic :: Scientific/Engineering",
     ],
     keywords="qiskit sdk quantum",
-    packages=packages,
+    packages=find_packages(exclude=['test*']),
     install_requires=requirements,
     include_package_data=True,
     python_requires=">=3.5",