Add port type on port option

According to [1] 
oslo.config can use portType to support the ability to set valid range 
on port option values. 
[1]: http://docs.openstack.org/developer/oslo.config/cfg.html

Change-Id: I71b6c7347f00e903321947074cdd55ee261bb505

murano/common/config.py

@@ -14,11 +14,14 @@
 #    under the License.
 
 from oslo_config import cfg
+from oslo_config import types
 from oslo_log import log as logging
 
 from murano.common.i18n import _
 from murano import version
 
+portType = types.Integer(1, 65535)
+
 paste_deploy_opts = [
     cfg.StrOpt('flavor', help='Paste flavor'),
     cfg.StrOpt('config_file', help='Path to Paste config file'),
@@ -27,8 +30,10 @@ paste_deploy_opts = [
 bind_opts = [
     cfg.StrOpt('bind-host', default='0.0.0.0',
                help='Address to bind the Murano API server to.'),
-    cfg.IntOpt('bind-port', default=8082,
-               help='Port the bind the Murano API server to.'),
+    cfg.Opt('bind-port',
+            type=portType,
+            default=8082,
+            help='Port the bind the Murano API server to.'),
 ]
 
 rabbit_opts = [
@@ -36,8 +41,10 @@ rabbit_opts = [
                help='The RabbitMQ broker address which used for communication '
                'with Murano guest agents.'),
 
-    cfg.IntOpt('port', default=5672,
-               help='The RabbitMQ broker port.'),
+    cfg.Opt('port',
+            type=portType,
+            default=5672,
+            help='The RabbitMQ broker port.'),
 
     cfg.StrOpt('login', default='guest',
                help='The RabbitMQ login.'),