fix nxos_ntp issues (#39178)

* fix nxos_ntp issues

* review comments

* fix idempotent fail case

test/integration/targets/nxos_ntp/tests/common/sanity.yaml

@@ -39,6 +39,25 @@
       that:
         - "result.changed == false"
 
+  - name: Configure ntp with some defaults
+    nxos_ntp: &config1
+      peer: 1.2.3.4
+      key_id: default
+      prefer: enabled
+      vrf_name: default
+      source_addr: default
+      state: present
+      provider: "{{ connection }}"
+    register: result
+
+  - assert: *true
+
+  - name: Idempotence Check
+    nxos_ntp: *config1
+    register: result
+
+  - assert: *false
+
   - name: Remove ntp config
     nxos_ntp: *remove
     register: result
@@ -51,6 +70,50 @@
 
   - assert: *false
 
+  - name: Configure ntp again
+    nxos_ntp: &config2
+      source_int: Ethernet1/3
+      peer: 1.2.3.4
+      prefer: enabled
+      state: present
+      provider: "{{ connection }}"
+    register: result
+
+  - assert: *true
+
+  - name: Idempotence Check
+    nxos_ntp: *config2
+    register: result
+
+  - assert: *false
+
+  - name: Remove source interface
+    nxos_ntp: &config3
+      source_int: default
+      state: present
+      provider: "{{ connection }}"
+    register: result
+
+  - assert: *true
+
+  - name: Idempotence Check
+    nxos_ntp: *config3
+    register: result
+
+  - assert: *false
+
+  - name: Remove ntp
+    nxos_ntp: *remove
+    register: result
+
+  - assert: *true
+
+  - name: Remove Idempotence Check
+    nxos_ntp: *remove
+    register: result
+
+  - assert: *false
+
   always:
   - name: Remove ntp config
     nxos_ntp: *remove