Fix for zabbix 3.4

Fix missing UpdateExisting for applications in Zabbix API 3.4

Author: dan-aksenov

mamonsu/tools/zabbix_cli/operations.py

@@ -171,8 +171,7 @@ def template(self, args):
                             'createMissing': True,
                             'updateExisting': True},
                         'applications': {
-                            'createMissing': True,
-                            'updateExisting': True},
+                            'createMissing': True},
                         'discoveryRules': {
                             'createMissing': True,
                             'updateExisting': True},