Cfn-python-lint: Add Rules for Route53 records

[fatbasstard]

There are a bunch of rules on recordsets, for instance the TXT records:

https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html#TXTFormat
https://tools.ietf.org/html/rfc1464

These are not checked "yet". Example we hit a couple of days ago was the fact that the TXT records have to be in quotes (So in YAML this ends up as quoted string in quotes.)

Example:

        - Name: !Sub "_amazonses.example.com."
          Type: "TXT"
          TTL: 900
          ResourceRecords:
            - "generatedrandomstring"

Breaks the CloudFormation deployment with the following error:

Invalid Resource Record: FATAL problem: InvalidCharacterString (Value should be enclosed in quotation marks) encountered with 'generatedrandomstring'
````

Should have been:

    - Name: !Sub "_amazonses.example.com."
      Type: "TXT"
      TTL: 900
      ResourceRecords:
        - "\"generatedrandomstring\""

```

Documentation: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html
Record Types:

• [x] A Record Type
• [x] AAAA Record Type
• [x] CAA Record Type
• [x] CNAME Record Type
• [x] MX Record Type
• [ ] NAPTR Record Type
• [x] NS Record Type
• [x] PTR Record Type
• [ ] SOA Record Type
• [ ] SPF Record Type
• [ ] SRV Record Type
• [x] TXT Record Type

There are more rules like this (See documentation: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html) that could/should be implemented.

More documenation urls:

• https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-values-basic.html
• https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-values-alias.html
• https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/resource-record-sets-choosing-alias-non-alias.html

[hoegertn]

Another check could be to verify that the HostedZoneName ends with a dot. Otherwise, CFN fails.