Use min and max on IntOpt option types

Latest version of oslo.config support the ability to set valid
range on IntOpt option values.  This path makes use of that feature
for a number of options with well known minimum and maximum values.

Change-Id: I26c920a2be68deeaa6ba534eb9d92b2960f78328

ceilometer/api/__init__.py

@@ -19,6 +19,7 @@ from oslo_config import cfg
 OPTS = [
     cfg.IntOpt('port',
                default=8777,
+               min=1, max=65535,
                deprecated_name='metering_api_port',
                deprecated_group='DEFAULT',
                help='The port for the ceilometer API server.',

ceilometer/collector.py

@@ -35,6 +35,7 @@ OPTS = [
                'an empty string to disable.'),
     cfg.IntOpt('udp_port',
                default=4952,
+               min=1, max=65535,
                help='Port to which the UDP socket is bound.'),
     cfg.BoolOpt('requeue_sample_on_dispatcher_error',
                 default=False,

ceilometer/compute/virt/vmware/inspector.py

@@ -34,6 +34,7 @@ OPTS = [
                help='IP address of the VMware vSphere host.'),
     cfg.IntOpt('host_port',
                default=443,
+               min=1, max=65535,
                help='Port of the VMware vSphere host.'),
     cfg.StrOpt('host_username',
                default='',