fix inits

* removed init file in wrappers folder causing error importing wrappers
* change imports for noise and utils to remove import *
* fixed typo in ref_measure for import qobj_utils

qiskit/providers/aer/__init__.py

@@ -10,8 +10,8 @@
 from .aerprovider import AerProvider
 from .aerjob import AerJob
 from .backends import *
-from .noise import *
-from .utils import *
+from . import noise
+from . import utils
 from .version import __version__
 
 # Global instance to be used as the entry point for convenience.

qiskit/providers/aer/backends/__init__.py

@@ -10,4 +10,3 @@
 from .qasm_simulator import QasmSimulator
 from .statevector_simulator import StatevectorSimulator
 from .unitary_simulator import UnitarySimulator
-

qiskit/providers/aer/utils/__init__.py

@@ -6,3 +6,5 @@
 # the LICENSE.txt file in the root directory of this source tree.
 
 """Utilities"""
+
+from . import qobj_utils

test/terra/utils/ref_measure.py

@@ -17,9 +17,9 @@
 # direclty by qobj instructions until terra compiler supports them
 from qiskit import compile
 from qiskit.providers.aer.backends import QasmSimulator
-from qiskit.providers.aer.utils.qobj_utils import insert_item
-from qiskit.providers.aer.utils.qobj_utils import measure_item
-from qiskit.providers.aer.utils.qobj_utils import iden_item
+from qiskit.providers.aer.utils.qobj_utils import insert_instr
+from qiskit.providers.aer.utils.qobj_utils import measure_instr
+from qiskit.providers.aer.utils.qobj_utils import iden_instr
 
 
 # ==========================================================================