Divide vmware_nsx/plugins into plugin-specific subdirectories

This patch will create:
vmware_nsx/plugins/dvs for DVS specific files
vmware_nsx/plugins/nsx_mh for MH specific files
vmware_nsx/plugins/nsx_v for nsx_v specific files
vmware_nsx/plugins/nsx_v3 for nsx_v3 specific files

also move vmware_nsx/vsphere/ to vmware_nsx/plugins/nsx_v/vsphere/.

This is part of new vmware_nsx directory structure proposed in
https://goo.gl/GdWXyH.

Change-Id: I00ee12da2eea0add988bae3d4f3e12940ea829bb

vmware_nsx/plugins/nsx_v/vshield/common/constants.py

@@ -0,0 +1,81 @@
+# Copyright 2013 OpenStack Foundation.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from oslo_config import cfg
+
+from vmware_nsx.common import nsxv_constants
+
+
+EDGE_ID = 'edge_id'
+ROUTER_ID = 'router_id'
+DHCP_EDGE_PREFIX = 'dhcp-'
+ROUTER_EDGE_PREFIX = 'router-'
+PLR_EDGE_PREFIX = 'plr-'
+BACKUP_ROUTER_PREFIX = 'backup-'
+EDGE_NAME_LEN = 20
+
+# Interface
+EXTERNAL_VNIC_INDEX = 0
+INTERNAL_VNIC_INDEX = 1
+EXTERNAL_VNIC_NAME = "external"
+INTERNAL_VNIC_NAME = "internal"
+MAX_VNIC_NUM = 10
+# we can add at most 8 interfaces on service edge. Other two interfaces
+# are used for metadata and external network access.
+MAX_INTF_NUM = 8
+MAX_TUNNEL_NUM = (cfg.CONF.nsxv.maximum_tunnels_per_vnic if
+                  (cfg.CONF.nsxv.maximum_tunnels_per_vnic < 110 and
+                   cfg.CONF.nsxv.maximum_tunnels_per_vnic > 0)
+                  else 10)
+
+INTEGRATION_LR_IPADDRESS = "169.254.2.1/28"
+INTEGRATION_EDGE_IPADDRESS = "169.254.2.3"
+INTEGRATION_SUBNET_NETMASK = "255.255.255.240"
+
+# SNAT rule location
+PREPEND = 0
+APPEND = -1
+
+# error code
+VCNS_ERROR_CODE_EDGE_NOT_RUNNING = 10013
+
+SUFFIX_LENGTH = 8
+
+#Edge size
+SERVICE_SIZE_MAPPING = {
+    'router': nsxv_constants.COMPACT,
+    'dhcp': nsxv_constants.COMPACT
+}
+ALLOWED_EDGE_SIZES = (nsxv_constants.COMPACT,
+                      nsxv_constants.LARGE,
+                      nsxv_constants.XLARGE,
+                      nsxv_constants.QUADLARGE)
+
+#Edge type
+ALLOWED_EDGE_TYPES = (nsxv_constants.SERVICE_EDGE,
+                      nsxv_constants.VDR_EDGE)
+
+
+# router status by number
+class RouterStatus(object):
+    ROUTER_STATUS_ACTIVE = 0
+    ROUTER_STATUS_DOWN = 1
+    ROUTER_STATUS_PENDING_CREATE = 2
+    ROUTER_STATUS_PENDING_DELETE = 3
+    ROUTER_STATUS_ERROR = 4
+
+
+class InternalEdgePurposes(object):
+    INTER_EDGE_PURPOSE = 'inter_edge_net'