azure_rm_dnsrecordset: fix updating SOA record

[akira6592]

SUMMARY

fix #1047

fix type convert error in updating SOA record.

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

• azure_rm_dnsrecordset

ADDITIONAL INFORMATION

integration test works fine in my local as bellow.

TASK [azure_rm_dnsrecordset : Update SOA record] *******************************
changed: [testhost] => {"changed": true, "state": {"etag": "xxxxx", "fqdn": "480b92c2cae5ec3d25349.com.", "id": "/subscriptions/xxxxx/resourceGroups/myrg/providers/Microsoft.Network/dnszones/480b92c2cae5ec3d25349.com/SOA/@", "name": "@", "provisioning_state": "Succeeded", "soa_record": {"email": "azuredns-hostmaster99.example.com", "expire_time": 2419299, "host": "ns1-99.example.com.", "minimum_ttl": 399, "refresh_time": 3699, "retry_time": 399, "serial_number": 99}, "target_resource": {}, "ttl": 3600, "type": "SOA"}}

[xuzhang3]

@akira6592 LGTM

[akira6592]

Thank you for the merge.