[2.6] Update ios tests (ansible#42509)

* 192.168.0.1/24 conflicts with management IP

* Images don't have the hostnames we expect
(cherry picked from commit 399d13d)

Co-authored-by: Nathaniel Case <this.is@nathanielca.se>

test/integration/targets/ios_config/tests/cli/diff.yaml

@@ -1,6 +1,10 @@
 ---
 - debug: msg="START cli/diff.yaml on connection={{ ansible_connection }}"
 
+- name: Ensure hostname is preset
+  ios_system:
+    hostname: "{{ shorter_hostname }}"
+
 - name: ios_config diff against retrieved config
   ios_config:
     diff_against: intended

test/integration/targets/ios_smoke/tests/cli/common_utils.yaml

@@ -30,7 +30,7 @@
 - name: Configure interface ipv4 address
   ios_l3_interface:
     name: "{{ test_interface }}"
-    ipv4: 192.168.0.1/24
+    ipv4: 192.168.20.1/24
     state: present
     provider: "{{ cli }}"
   register: result
@@ -39,12 +39,12 @@
     that:
       - 'result.changed == true'
       - '"interface {{ test_interface }}" in result.commands'
-      - '"ip address 192.168.0.1 255.255.255.0" in result.commands'
+      - '"ip address 192.168.20.1 255.255.255.0" in result.commands'
 
 - name: test invalid subnet
   ios_l3_interface:
     name: "{{ test_interface }}"
-    ipv4: 192.168.0.1/45
+    ipv4: 192.168.20.1/45
     state: present
     provider: "{{ cli }}"
   register: result