Add V2 inbound_sms API

- had to update the serialization in the model so that the date time is appended with the UTC timezone
- test has been added to ensure that the schema will validate the response correctly

app/v2/inbound_sms/get_inbound_sms.py

@@ -0,0 +1,36 @@
+import uuid
+
+from flask import jsonify, request, url_for, current_app
+from sqlalchemy.orm.exc import NoResultFound
+from werkzeug.exceptions import abort
+
+from notifications_utils.recipients import validate_and_format_phone_number
+from notifications_utils.recipients import InvalidPhoneError
+
+from app import authenticated_service
+from app.dao import inbound_sms_dao
+from app.v2.errors import BadRequestError
+from app.v2.inbound_sms import v2_inbound_sms_blueprint
+
+
+@v2_inbound_sms_blueprint.route("/<user_number>", methods=['GET'])
+def get_inbound_sms_by_number(user_number):
+    try:
+        validate_and_format_phone_number(user_number)
+    except InvalidPhoneError as e:
+        raise BadRequestError(message=str(e))
+
+    inbound_sms = inbound_sms_dao.dao_get_inbound_sms_for_service(
+        authenticated_service.id, user_number=user_number
+    )
+
+    return jsonify(inbound_sms_list=[i.serialize() for i in inbound_sms]), 200
+
+
+@v2_inbound_sms_blueprint.route("", methods=['GET'])
+def get_all_inbound_sms():
+    all_inbound_sms = inbound_sms_dao.dao_get_inbound_sms_for_service(
+        authenticated_service.id
+    )
+
+    return jsonify(inbound_sms_list=[i.serialize() for i in all_inbound_sms]), 200