Add exception handling to avoid crash when comparing types

[kbreit]

is_update_required() didn't handle exceptions if the types were different. This used to be handled by the type comparison, but since that is removed, this is needed.

This pull request fixes the corner case where the proposed object isn't a dict so .items() would crash. The AttributeError exception is now handled.

Fixes #6

• meraki_admin.py
• meraki_config_template.py
• meraki_content_filtering.py
• meraki_device.py
• meraki_firewalled_services.py
• meraki_malware.py
• meraki_mr_l3_firewall.py
• meraki_mx_l3_firewall.py
• meraki_mx_l7_firewall.py
• meraki_nat.py
• meraki_network.py
• meraki_organization.py
• meraki_snmp.py
• meraki_ssid.py
• meraki_static_route.py
• meraki_switchport.py
• meraki_syslog.py
• meraki_vlan.py
• meraki_webhook.py