asa_config/ios_config: diff strict does not work with multiple parents (#45150)

* multiple parents issues in diff

* Integration tests for missing functionality

* add testcase for other platforms. vnxos does not support qos so need to find a command chain on v-nxos for multiple parets. junos uses on-device diff so should not need this.

* Fix for issue when any candidate parent did not meet the exact line in running-config

* DCI runs eos_config without become flag

lib/ansible/module_utils/network/common/config.py

@@ -296,6 +296,14 @@ class NetworkConfig(object):
 
     def _diff_strict(self, other):
         updates = list()
+        # block extracted from other does not have all parents
+        # but the last one. In case of multiple parents we need
+        # to add additional parents.
+        if other and isinstance(other, list) and len(other) > 0:
+            start_other = other[0]
+            if start_other.parents:
+                for parent in start_other.parents:
+                    other.insert(0, ConfigLine(parent))
         for index, line in enumerate(self.items):
             try:
                 if str(line).strip() != str(other[index]).strip():