vmware_vmkernel: no error on state=absent

The `network.type` parameter is set to default on default on `static`.
As a consequence, the network parameter is always defined as `dict`.

This patch ensures we don't check the value of the network configuration
if we want to delete the interface.

lib/ansible/modules/cloud/vmware/vmware_vmkernel.py

@@ -286,18 +286,7 @@ class PyVmomiHelper(PyVmomi):
             self.ip_address = self.params['network'].get('ip_address', None)
             self.subnet_mask = self.params['network'].get('subnet_mask', None)
             self.default_gateway = self.params['network'].get('default_gateway', None)
-            if self.network_type == 'static':
-                if not self.ip_address:
-                    module.fail_json(msg="ip_address is a required parameter when network type is set to 'static'")
-                if not self.subnet_mask:
-                    module.fail_json(msg="subnet_mask is a required parameter when network type is set to 'static'")
             self.tcpip_stack = self.params['network'].get('tcpip_stack')
-        else:
-            self.network_type = 'dhcp'
-            self.ip_address = None
-            self.subnet_mask = None
-            self.default_gateway = None
-            self.tcpip_stack = 'default'
         self.device = self.params['device']
         if self.network_type == 'dhcp' and not self.device:
             module.fail_json(msg="device is a required parameter when network type is set to 'dhcp'")
@@ -323,6 +312,14 @@ class PyVmomiHelper(PyVmomi):
                 msg="Failed to get details of ESXi server. Please specify esxi_hostname."
             )
 
+        if self.network_type == 'static':
+            if self.module.params['state'] == 'absent':
+                pass
+            elif not self.ip_address:
+                module.fail_json(msg="ip_address is a required parameter when network type is set to 'static'")
+            elif not self.subnet_mask:
+                module.fail_json(msg="subnet_mask is a required parameter when network type is set to 'static'")
+
         # find Port Group
         if self.vswitch_name:
             self.port_group_obj = self.get_port_group_by_name(