is_update_required() should handle different types to avoid traceback

[kbreit]

is_update_required() no longer does a type check which means there can be a segmentation fault if .items() is used on objects other than a dict. Exception handling should fix this problem.

TASK [meraki_content_filtering : Set blocked URL category using net_id] ********
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: AttributeError: 'str' object has no attribute 'items'
fatal: [localhost]: FAILED! => {"changed": false, "module_stderr": "Traceback (most recent call last):\n  File \"/root/.ansible/tmp/ansible-tmp-1577141540.0925586-253906176221639/AnsiballZ_meraki_content_filtering.py\", line 116, in <module>\n    _ansiballz_main()\n  File \"/root/.ansible/tmp/ansible-tmp-1577141540.0925586-253906176221639/AnsiballZ_meraki_content_filtering.py\", line 108, in _ansiballz_main\n    invoke_module(zipped_mod, temp_path, ANSIBALLZ_PARAMS)\n  File \"/root/.ansible/tmp/ansible-tmp-1577141540.0925586-253906176221639/AnsiballZ_meraki_content_filtering.py\", line 54, in invoke_module\n    runpy.run_module(mod_name='ansible_collections.cisco.meraki.plugins.modules.meraki_content_filtering', init_globals=None, run_name='__main__', alter_sys=True)\n  File \"/usr/lib/python3.6/runpy.py\", line 205, in run_module\n    return _run_module_code(code, init_globals, run_name, mod_spec)\n  File \"/usr/lib/python3.6/runpy.py\", line 96, in _run_module_code\n    mod_name, mod_spec, pkg_name, script_name)\n  File \"/usr/lib/python3.6/runpy.py\", line 85, in _run_code\n    exec(code, run_globals)\n  File \"/tmp/ansible_meraki_content_filtering_payload_x_7y2c19/ansible_meraki_content_filtering_payload.zip/ansible_collections/cisco/meraki/plugins/modules/meraki_content_filtering.py\", line 248, in <module>\n  File \"/tmp/ansible_meraki_content_filtering_payload_x_7y2c19/ansible_meraki_content_filtering_payload.zip/ansible_collections/cisco/meraki/plugins/modules/meraki_content_filtering.py\", line 221, in main\n  File \"/tmp/ansible_meraki_content_filtering_payload_x_7y2c19/ansible_meraki_content_filtering_payload.zip/ansible_collections/cisco/meraki/plugins/module_utils/network/meraki/meraki.py\", line 245, in is_update_required\n  File \"/tmp/ansible_meraki_content_filtering_payload_x_7y2c19/ansible_meraki_content_filtering_payload.zip/ansible_collections/cisco/meraki/plugins/module_utils/network/meraki/meraki.py\", line 238, in is_update_required\n  File \"/tmp/ansible_meraki_content_filtering_payload_x_7y2c19/ansible_meraki_content_filtering_payload.zip/ansible_collections/cisco/meraki/plugins/module_utils/network/meraki/meraki.py\", line 242, in is_update_required\nAttributeError: 'str' object has no attribute 'items'\n", "module_stdout": "", "msg": "MODULE FAILURE\nSee stdout/stderr for the exact error", "rc": 1}