VMware: Improve vmware_portgroup (#56382)

* Rewrite vmware_portgroup module
* support check mode
* VLAN ID isn't required anymore
* VLAN ID 0 (no tagging) is the default
* Options match values in vSphere Client and vmware_vswitch module
* Policy override is configured properly
* VMware: vmware_portgroup updates

test/integration/targets/vmware_portgroup/aliases

@@ -0,0 +1,3 @@
+cloud/vcenter
+shippable/vcenter/group1
+needs/target/prepare_vmware_tests

test/integration/targets/vmware_portgroup/tasks/main.yml

@@ -0,0 +1,68 @@
+# Test code for the vmware_portgroup module.
+# Copyright: (c) 2018, Abhijeet Kasurde <akasurde@redhat.com>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+- when: vcsim is not defined
+  block:
+    - debug: var=ccr1
+
+    - debug: var=host1
+
+    - name: Create portgroup without Portgroup and vSwitch
+      vmware_portgroup:
+        hostname: '{{ vcenter_hostname }}'
+        username: '{{ vcenter_username }}'
+        password: '{{ vcenter_password }}'
+        validate_certs: no
+      ignore_errors: yes
+      register: no_pg_vs
+
+    - assert:
+        that:
+          - '"missing" in no_pg_vs.msg'
+
+    - name: Create portgroup without Portgroup
+      vmware_portgroup:
+        hostname: '{{ vcenter_hostname }}'
+        username: '{{ vcenter_username }}'
+        password: '{{ vcenter_password }}'
+        vswitch: ''
+        validate_certs: no
+      ignore_errors: yes
+      register: no_vs
+
+    - assert:
+        that:
+          - '"missing" in no_vs.msg'
+
+    - name: Create portgroup without cluster
+      vmware_portgroup:
+        hostname: '{{ vcenter_hostname }}'
+        username: '{{ vcenter_username }}'
+        password: '{{ vcenter_password }}'
+        vswitch: 'vSwitch_03'
+        portgroup: 'pg_03'
+        validate_certs: no
+      ignore_errors: yes
+      register: no_cluster
+
+    - assert:
+        that:
+          - '"cluster_name" in no_cluster.msg'
+
+    - name: Create portgroup
+      vmware_portgroup:
+        hostname: '{{ vcenter_hostname }}'
+        username: '{{ vcenter_username }}'
+        password: '{{ vcenter_password }}'
+        vswitch: 'vSwitch_03'
+        portgroup: 'pg_03'
+        cluster_name: "{{ ccr1 }}"
+        validate_certs: no
+        state: present
+      ignore_errors: yes
+      register: pg_info
+
+    - assert:
+        that:
+          - pg_info.changed