ios_file: Don't leave leftover files behind (#42622)

* Don't leave leftover files behind

* Fix writing files in python3

* Replace nonascii.bin with one that will not pass for unicode

test/integration/targets/ios_file/tests/cli/net_get.yaml

@@ -19,14 +19,14 @@
 
 - name: setup (remove file from localhost if present)
   file:
-      path: ios_{{ ansible_host }}.cfg
+      path: ios_{{ inventory_hostname }}.cfg
       state: absent
   delegate_to: localhost
 
 - name: get the file from device with relative destination
   net_get:
     src: ios1.cfg
-    dest: 'ios_{{ ansible_host }}.cfg'
+    dest: 'ios_{{ inventory_hostname }}.cfg'
   register: result
 
 - assert:
@@ -36,11 +36,17 @@
 - name: Idempotency check
   net_get:
     src: ios1.cfg
-    dest: 'ios_{{ ansible_host }}.cfg'
+    dest: 'ios_{{ inventory_hostname }}.cfg'
   register: result
 
 - assert:
     that:
       - result.changed == false
 
+- name: setup (remove file from localhost if present)
+  file:
+      path: ios_{{ inventory_hostname }}.cfg
+      state: absent
+  delegate_to: localhost
+
 - debug: msg="END ios cli/net_get.yaml on connection={{ ansible_connection }}"

test/integration/targets/ios_file/tests/cli/net_put.yaml

@@ -1,5 +1,6 @@
 ---
-- debug: msg="START ios cli/net_put.yaml on connection={{ ansible_connection }}"
+- debug:
+    msg: "START ios cli/net_put.yaml on connection={{ ansible_connection }}"
 
 # Add minimal testcase to check args are passed correctly to
 # implementation module and module run is successful.
@@ -12,22 +13,13 @@
       - username {{ ansible_ssh_user }} privilege 15
     match: none
 
-- name: Delete existing file ios1.cfg if presen on remote host
+- name: Delete existing files if present on remote host
   ios_command:
-     commands:
-         - command: 'delete /force ios1.cfg'
-  ignore_errors: true
-
-- name: Delete existing file ios.cfg if presen on remote host
-  ios_command:
-     commands:
-         - command: 'delete /force ios.cfg'
-  ignore_errors: true
-
-- name: Delete existing file nonascii.bin if presen on remote host
-  ios_command:
-     commands:
-         - command: 'delete /force nonascii.bin'
+     commands: "{{ item }}"
+  loop:
+     - delete /force ios1.cfg
+     - delete /force ios.cfg
+     - delete /force nonascii.bin
   ignore_errors: true
 
 - name: copy file from controller to ios + scp (Default)
@@ -65,6 +57,10 @@
   register: result
   ignore_errors: true
 
+- assert:
+    that:
+      - result.failed == true
+
 - name: copy file with non-ascii characters to ios in default mode(binary)
   net_put:
     src: nonascii.bin